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Appendix Q: How to Measure, Assemble and Install Link Belt

How to Measure

Pull belt tight around sheaves to
check hand tight length, overlapping
the last two tabs with two holes in
matching links as shown. Count the
number of links and remove one link
for every 24 of O/3L, A/4L and B/5L
Sections and one link for every 20
of C and D Sections. This gives the
correct installed belt length and will
ensure optimum belt tension when running.

Disassembly

1. Hold belt upside down. Bend back as far as pos-

sible; hold with one hand. Twist one tab 90 degrees
parallel with slot.

2.  Pull end of link over tab.
3.  Rotate belt end with tab 90 degrees.
4.  Pull belt end through two links.

Assembly

1.  Hold belt with tabs pointing outward.
2.  Place end tab through two links at once.
3.  Flex belt further and insert second tab through end

link by twisting tab with thumb.

4. Ensure tab returns to position across belt. Reverse

belt so tabs run inside.

Installation

1.  Turn belt with tabs to the inside before installing.
2.  Determine direction of drive rotation.
3.  Align belt directional arrow (

←

) with drive rotation.

4. Fit belt in nearest groove of smaller sheave.
5. Roll belt onto larger sheave, turning the drive slowly.

Belt may seem very tight; this is okay. Do not jog
motor.

6. Check to see all tabs are still in their correct position

and are not twisted out of alignment.

7. For multiple belt drives, work belt from groove to

groove. On particularly wide drives, it may be easier
to install half the belts from the inboard side and half
from the outboard.

IMPORTANT

Every tenth link is designated with an arrow (

←

). For

multiple belt drives, ensure that each belt has the same

number of links.

IMPORTANT

Turn belt inside out (as shown) to ensure easy assembly
and disassembly.

Figure Q1: Multi-
link drive belt

Figure Q2: Disassemble multi-link drive belt

Figure Q3: Assemble multi-link drive belt

VCES-VHC-IOM-1F – VHC-36, -42 & -50

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Содержание VENMARCES VHC-36

Страница 1: ...rvice agency must perform all installation and service of these appliances FOR YOUR SAFETY What to do if you smell gas 1 Open windows if appliance is indoors 2 Do not touch electrical switches or use...

Страница 2: ...ems 24 System Operation Check 25 Appendix A Service Clearance Dimensions 26 Appendix B Hood Installation 34 Appendix C Rigging Drawing 35 Appendix D Equipment Data 36 Appendix E Effect of Undersized S...

Страница 3: ...anies Venmar Select from Nortek Air Solutions Variable Refrigerant Control VRC from Nortek Air Solutions and Tefzel from DuPont Nortek Air Solutions LLC d b a Venmar CES furnishes equipment pursuant t...

Страница 4: ...red All documentation that was specifically designed for your unit has been included in the pocket of the control panel including if applicable Electrical schematics VHC 36 42 and 50 DDC Controls Pack...

Страница 5: ...to flow into internal drains The foundation must provide adequate continuous sup port to minimize deflection of the unit base frame to not more than 1 16 1 6 mm over entire length In addition to these...

Страница 6: ...upplied by Others Roofcurbs supplied by others must be designed with the same dimensions and cross member arrangement as per Venmar CES roofcurb drawings and must be designed to evenly withstand perim...

Страница 7: ...on and are 6 mm smaller outside of frame than the duct size listed The motorized dampers are for flanged to duct installation and are the same size as the duct size listed inside of the damper frame T...

Страница 8: ...al 1 000 fpm outlet velocity to the length of the straight portion of discharge duct The equivalent duct diameter is equal to square root of 4ab Pi where a and b are the rectangu lar dimensions of the...

Страница 9: ...pendix B A quick connect for the damper motors is provided to connect to the main body of the unit Make sure that all screws are secured to maintain proper support and keep seals water tight Access Pa...

Страница 10: ...pendix G which runs through the outside casing and requires a liquid tight connector or conduit to avoid water penetration Should the Electrical Contractor decide to run the power feed cable through t...

Страница 11: ...nd defrost will initiate based on the setpoint Unoccupied Recirculation Ur If the unoccupied recirculation contact closes or a jumper is placed across terminals FW 305 306 the unit will turn off unles...

Страница 12: ...e connections is recommended to be installed in the water line for balancing and service Before connecting piping to the unit the water supply line and return line must be flushed to eliminate the for...

Страница 13: ...drains annually at start of cooling sea son Drainage problems can occur should drains be inac tive and dry out or due to reduced water flow caused by buildup of algae Regular maintenance will prevent...

Страница 14: ...n minimum clearance and the dis charge is not blocked 10 Check that the water strainer has been installed for a water source heat pump with a brazed heat exchanger 11 Check that ductwork is connected...

Страница 15: ...er if equipped opens after exhaust air damper opens exhaust blower starts occupied recirculation damper opens outside and exhaust air dampers modulate to the damper minimum setpoints 5 Check that damp...

Страница 16: ...ventilation control ac cessory or field supplied by connecting normally open high speed contacts to the supply and exhaust fan high speed input terminals for two speed High Low ventila tion control se...

Страница 17: ...electric heating coil and the enthalpy wheel The electric heating coil is selectable in 1 kW incre ments and available in two stage four stage or SCR con trol With staged control one stage cycles to...

Страница 18: ...more than 15 The FMS should be located downstream from straight sections of duct and not immediately after fans or obstructions that will cause turbulent flow Refer to Appendix K for optional gas fir...

Страница 19: ...ilters and optional high efficiency filters are disposable and should be replaced every three months More frequent replacement may be required under extremely dirty operating conditions To replace the...

Страница 20: ...ctor from the motor 1 Figure 5 Loosen the two adjustment bolts 2 Figure 5 on the base plate Rotate the motor and base plate to remove the belt Remove the four bolts 3 Figure 5 and slide the motor asse...

Страница 21: ...ch as isopropyl alcohol Insert the bushing into the fan making sure the mating hub is flush against the shoulder at the flats Posi tion the assembly at the desired location on the motor shaft and hand...

Страница 22: ...1 Figure 9 from the bearing on the drive motor side of the cas sette Remove the bolt 2 Figure 9 from the end of the wheel shaft with a socket or wrench on the drive motor side Repeat this procedure fo...

Страница 23: ...e drive motor See Appen dix Q for belt tensioning and replacement instructions The multi link belt is factory set for proper tension but should it need a tension adjustment simply remove one of the li...

Страница 24: ...conditions hence a suitable cleaning schedule should be arranged based on experience and knowledge of the building or local water supply loop Coils Dirt on the surface of the coil reduces its ability...

Страница 25: ...s leaving the evaporator and the pres sure in the evaporator the thermostatic expansion valve can control the refrigerant gas leaving the evaporator at a pre determined superheat Three forces that gov...

Страница 26: ...or return damper Exhaust rilters Control box Power line input control wiring Electric post heat Cooling heating coil Supply blower 36 0 914 34 0 864 46 0 1 168 Electric pre heat 34 0 864 Standard cass...

Страница 27: ...er Exhaust filters Electric post heat Control box Cooling heating coil Supply blower Power line input control wiring 36 0 914 Electric pre heat 46 0 1 168 56 0 1 422 Standard cassette removal 34 0 864...

Страница 28: ...return damper Exhaust filters Control box Electric post heat Power line input control wiring 36 0 914 Supply blower Cooling heating coil 56 0 1 422 Standard cassette removal 34 0 864 46 0 1 168 Clear...

Страница 29: ...ake hood For indoor units Vent termination and combustion air intake must comply with the National Fuel Gas Code Z2223 1 NFPA54 in the U S in Canada to the Gas Installation Code Can CGA B149 See Acces...

Страница 30: ...8 Clearance for enthalpy wheel removal Clearance for S OA intake hood Clearance for S EA hood For indoor units Vent termination and combustion air intake must comply with the National Fuel Gas Code Z2...

Страница 31: ...haust filters Control box Compressor Coaxial coil WSHP module Supply blower Electric post heat Power line input control wiring 36 0 914 Water inlet and outlet connections Note All dimensions in are mi...

Страница 32: ...blower Cooling heating coil 34 0 864 46 0 1 168 Electric pre heat Supply filters Defrost or unoccupied recirc damper 34 0 864 Enthalpy wheel Occupied recirc or return damper Exhaust filters Exhaust bl...

Страница 33: ...Cooling heating coil Supply blower Electric post heat Control box Power line input control wiring 36 0 914 Standard cassette removal 56 0 1 422 34 0 864 46 0 1 168 Electric pre heat Clearance for enth...

Страница 34: ...IMPORTANT Complete wire connections between the unit and the hood by matching the correct wire colors on the actuator with the wire colors on the schematic Figure B1 Outdoor VHC hood installation VCE...

Страница 35: ...n even vertical lifting force only at all the lifting points to prevent damage to the unit casing 2 Provide additional blocking and coverings as required to prevent damage to the unit finish and or co...

Страница 36: ...90 w g 0 20 to 0 90 w g 0 30 to 1 00 w g Filters Supply and return 2 51 mm MEF MERV 8 30 35 1 of 20 x 20 508 x 508 mm 1 of 16 x 20 406 x 508 mm 1 of 18 x 24 457 x 610 mm 1 of 24 x 24 610 x 610 mm 4 o...

Страница 37: ...bow position B pressure drop x 1 25 b Elbow position D pressure drop x 0 85 c Elbow position A and C pressure drop x 1 00 Position D Position C Position B Position A Inlet effective duct length Figure...

Страница 38: ...local building codes WARNING All units equipped with two point electric post heaters require two point power connections one to the con trol panel and one to the electric heater circuit breaker mounte...

Страница 39: ...0 On off 33 3 17 9 12 8 VRC 33 3 17 9 12 8 12 On off 48 1 18 6 14 7 VRC 48 1 18 6 14 7 14 On off 51 3 23 1 19 9 VRC 51 3 23 1 19 9 16 On off 55 8 26 9 23 7 VRC 55 8 26 9 23 7 21 On off 30 4 24 6 VRC A...

Страница 40: ...Amperage RLA Compressor Tonnage Cooling Type Voltage 208 230 1 60 208 230 3 60 460 3 60 575 3 60 Water Cooled Single Circuit 2 Two stage 15 3 11 6 5 7 4 0 3 Two stage 17 9 14 2 6 2 4 Two stage 28 8 16...

Страница 41: ...rather be selected such that the actual MOP is at least equal to the calculated total MCA Table F5 Dual Circuit Compressors For Dual Circuit On Off Units 6 tons Two 3 ton on off compressors 8 tons Two...

Страница 42: ...IRTY SUPPLY FILTER OPTIONAL DIRTY EXHAUST FILTER OPTIONAL WHEEL FAILURE OPTIONAL EXHAUST BLOWER ON COIL LOW LIMIT OPTIONAL 24 VAC OUTPUTS 20 VA MAXIMUM SUPPLY BLOWER ON HEATING ON OPTIONAL COOLING STA...

Страница 43: ...ries for con nection to internal coils selected 24 VAC 24 VAC SUPPLY BLOWER MODULATING SHIELD OPTIONAL EXHAUST BLOWER MODULATING 0 10 VDC OPTIONAL SUPPLY BLOWER MODULATING 0 10 VDC OPTIONAL SUPPLY BLO...

Страница 44: ...e quire a dry contact which could be provided by a number of types of controls such as a timer light sensor occu pancy sensor building management system or other The unit will not operate unless these...

Страница 45: ...could also be the following DPST switch de humidistat CO2 sensor light sensor heat sensor timer building management system etc 301 302 304 305 305 306 307 308 320 321 322 323 324 325 326 327 328 329...

Страница 46: ...o NFPA 90A and IMC Code 606 VHCs can be equipped with a duct mount smoke de tector which will monitor the air when passing through the duct system into the VHC When sufficient smoke is detected an ala...

Страница 47: ...sors are factory set to close contacts at 0 8 w c 200 Pa 301 302 304 305 305 306 307 308 320 321 322 323 324 325 326 327 328 329 DIRTY SUPPLY FILTER 24 VAC OUTPUTS 20 VA MAXIMUM DIRTY EXHAUST FILTER...

Страница 48: ...compressor start up and remain open five seconds after the compressor is shut off IMPORTANT Water source heat pump external water supply and return piping shall be in accordance with national and loc...

Страница 49: ...ature which will shut down the compressor and unit for freeze protection The flow switch also features an adjustment which allows the user to change the switch from normally open NO to nor mally close...

Страница 50: ...016468S 500027836 19 400 1 12 36 8 7 400 201909070S 500027838 37 400 1 14 42 7 3 400 201909070S 500027838 37 400 1 16 44 3 8 400 201909070S 500027838 37 400 1 Dual circuit 6 18 4 7 400 500016468S 5000...

Страница 51: ...int Nominal voltage 24 VAC 50 60 Hz Nominal voltage range 19 2 28 8 VAC Power consumption 1 W Transformer sizing 1 VA Class 2 power source Electrical connection Screw terminals accessible after remova...

Страница 52: ...A B 1 69 42 mm 3 22 82 mm Figure I3 Indoor three way valve actuator 6 to 8 tons Table I9 Indoor Three way Valve Actuator Technical and Dimensional Data 6 to 8 tons Power supply 24 VAC 20 50 60 Hz 24 V...

Страница 53: ...nches DN mm A B C 1 32 mm 3 96 100 6 2 21 56 2 2 14 54 3 1 40 mm 4 39 111 6 2 45 62 2 2 33 59 1 2 50 mm 4 90 124 5 2 68 68 0 2 60 66 0 Table I13 Indoor Three way Valve Actuator Technical and Dimension...

Страница 54: ...ve actuator 10 to 21 tons Table I15 Outdoor Three way Valve Actuator Technical and Dimensional Data 10 to 21 tons Power supply 24 VAC 20 50 60 Hz 24 VDC 10 Power consumption Running Holding 2 5 W 0 4...

Страница 55: ...able wrench across the hexagonal or flat faces on the valve body If assembling valve train on bench take care not to deform the body with a vise 1 input 2 outputs Coil Return Supply B A AB Figure I11...

Страница 56: ...ly closed To change the switching from normally open to normally closed loosen but do not remove the two screws on the top cap Slide the reed switch assembly to expose the switch action se lected Tigh...

Страница 57: ...n and Maintenance Instructions Manual and the VHC 36 42 and 50 DDC Controls Package Manual if equipped before proceeding Leave a copy of this report with the Owner and at the unit for future reference...

Страница 58: ...for WSHP with brazed heat exchanger 11 Is ductwork connected and complete 12 Are condensate drain connections trapped installed correctly and filled 13 Are all shipped loose or field supplied componen...

Страница 59: ...ulation mode adjust outside air and exhaust air damper positioner to achieve the required air volume 8 Re check the voltage at the disconnect switch against the nameplate and against phase to phase re...

Страница 60: ...perature F db wb Outdoor entering Supply enthalpy wheel entering Supply enthalpy wheel leaving Cooling coil leaving Heating coil leaving Re heat coil leaving Supply leaving Return entering Exhaust ent...

Страница 61: ...ure F Electric heating Stage 1 2 3 4 5 6 Amp draw L1 Amp draw L2 Amp draw L3 This unit has been checked out and started according with the above procedures and completed forms and is operating satisfa...

Страница 62: ...This page intentionally left blank VCES VHC IOM 1F VHC 36 42 50 62...

Страница 63: ...ng the gas furnace into service 1 Gas supply provided matches the gas type marked on the furnace module rating plate the gas supply line has been completed according to the Gas Sup ply Piping and Conn...

Страница 64: ...t the flue gas discharge path see Figure I1 Where sufficient clearance for proper horizontal venting cannot be provided or in jurisdictions requiring a 4 foot separation between flue gas discharge and...

Страница 65: ...nace must be connected to a separate factory built chimney or vent complying with a recognized stan dard or a masonry or concrete chimney lined with a mate rial acceptable to the authority having juri...

Страница 66: ...vent deg radation of building material by flue gases The vent terminal must be located at least 1 foot 305 mm above grade or in snow areas at least 3 feet 1 m above snow line to prevent blockage Addit...

Страница 67: ...the furnace control en closure which must be field extended to the exterior of the cabinet The gas supply line feeding more than one furnace must be checked for size relative to the connection at each...

Страница 68: ...to ensure that the operating air temperature rise is above the dew point temperature of the flue gases in all appli cations and below the maximum allowable air tem perature rise to limit the furnace t...

Страница 69: ...m where the temperature is uniform and make the proper adjustments Figure K10 Vertical airflow configuration WARNING Operation of the furnace module at vent temperatures below that specified for a Cat...

Страница 70: ...8 Turn gas control knob to On position 9 Open all manual gas valves 10 Turn power on at disconnect switch 11 For start up temporarily set the DDC Control Sys tem for heating and to its highest positi...

Страница 71: ...flue gas recirculation into combustion air supply Increase air opening size or re direct flue products to pre vent recirculation d Reduced air delivery can also be the result of fan blade slippage dir...

Страница 72: ...uced circulating airflow over the heat exchanger Reduced airflow can be caused by motor failure of the circulating air blower dirt blockage or restriction of the air inlet or outlet to the unit The hi...

Страница 73: ...tch APS 1 closes a 15 second pre purge period begins 6 At end of pre purge period the spark commences and the gas valves both first and second stage are energized for the trial for ignition period 7 B...

Страница 74: ...will check that pressure switch contacts are open IC terminal PSW is not powered 4 Combustion blower is then energized at high speed 5 When the air switch APS1 closes a 15 second pre purge period beg...

Страница 75: ...efer to Table K3 for further LED code troubleshooting MH Sequence of Operation 20 100 Modulation with Two speed Controller Fenwal 35 61 Series Direct Ignition Control TR1 Timer Relay Control and SC30...

Страница 76: ...in 0 8 seconds The spark will be energized for a trial for ignition period to attempt to re light burners and prove flame sensor If flame is re established normal operation resumes 2 If the burners fa...

Страница 77: ...n proper wheel attachment proper voltage to blower 1 Flash Airflow fault Pressure switch contacts in closed position for 30 seconds with no output to combustion blower Remains in this mode with combus...

Страница 78: ...is energized Is spark present If no check igniter for debris between electrodes cracked ceramic and check ignition wire for short to ground Check flame sensor wiring connections to electrode and contr...

Страница 79: ...e only wires suitable for 167 F 75 C Wires shall be sized according to the Canadian Electrical Code require ments All wires must be brought in through knockouts 2 4 Disconnecting Means Install a disco...

Страница 80: ...inspec tion This precautionary step will help to keep your instal lations operating well Note these eventual first signs of problems Accumulation of dust on the heating elements Signs of overheating...

Страница 81: ...dard 0 000256441 0 000224715 50 x 8 high 0 000164571 0 000144459 0 5 0 6 0 7 0 8 0 9 1 0 1 1 1 2 1 3 0 4 0 3 0 1 0 2 0 0 0 500 1 000 1 500 2 000 2 500 3 000 Airflow cfm Pressure Drop in w g 36 x 8 Sup...

Страница 82: ...erailment off drive pulley or failure Drive pulley Check for securely fastened pulley on motor shaft Motor and blower not functioning Electrical supply interrupted Check unit circuit breaker Fan motor...

Страница 83: ...plication range Refrigerant overcharge Charge correct amount of refrigerant Non condensable air accumulates in the coaxial coil Vacuum system re charge refrigerant Coaxial coil scaled Clean coaxial co...

Страница 84: ...rt and grease accumulation Clean as necessary Do not use any caustic cleaning solutions x 21 Examine fan housings and motor pedestal for corrosion Clean and touch up with paint as necessary x 22 Check...

Страница 85: ...ettings x 43 Verify system operation in all control modes x Notes 1 Check filters weekly after initial start up until construction dust has been cleared and to gauge required interval 2 Check set scre...

Страница 86: ...1 960 63 1 620 64 2 720 47 2 380 52 1 960 53 3 200 37 2 800 40 2 300 42 Grease type NLGI 2 Lithium complex grease Fan Model ATL1 12 12 ATL1 15 11 ATL1 18 13 Class T2 T2 T2 Bearing Size 1 3 16 1 3 16 1...

Страница 87: ...humb 4 Ensure tab returns to position across belt Reverse belt so tabs run inside Installation 1 Turn belt with tabs to the inside before installing 2 Determine direction of drive rotation 3 Align bel...

Страница 88: ...us V belts require the maintenance of correct drive tension to operate efficiently Experience indicates that drive tension should be checked after 24 hours running at full load A retension may be nece...

Страница 89: ...R2 Subtract the measured liquid line temperature from the saturated tempera ture to determine the liquid sub cooling 4 Compare calculated sub cooling to Table R1 for the appropriate unit type and opt...

Страница 90: ...G F PSIG F PSIG 20 78 3 47 134 7 74 213 7 101 321 0 128 463 2 21 80 0 48 137 2 75 217 1 102 325 6 129 469 3 22 81 8 49 139 7 76 220 6 103 330 2 130 475 4 23 83 6 50 142 2 77 224 1 104 334 9 131 481 6...

Страница 91: ...BH 250 MBH 300 MBH 350 MBH 1 500 1 600 94 1 1 700 88 5 1 800 83 6 1 900 79 2 2 000 75 2 94 1 2 100 71 7 89 6 2 200 68 4 85 5 2 300 65 4 81 8 2 400 62 7 78 4 94 1 2 500 60 2 75 2 90 3 2 600 57 9 72 3 8...

Страница 92: ...73 4 4 200 44 8 53 7 62 7 71 7 4 300 43 7 52 5 61 2 70 0 4 400 42 8 51 3 59 9 68 4 4 500 41 8 50 2 58 5 66 9 4 600 40 9 49 1 57 2 65 4 4 700 40 0 48 0 56 0 64 0 4 800 39 2 47 0 54 9 62 7 4 900 38 4 46...

Страница 93: ...ons Canada Inc VCES VHC IOM 1F PN 216013 March 2015 Nortek Air Solutions has a policy of continuous improvement and reserves the right to change design and specifications without notice info venmarces...

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