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This condition may result in the heater cycling on the high limit

thermal cutout. Open-strip heaters have an automatic reset switch

and high-limit thermal switch as a backup. Automatic reset limit

switches  reset  after  the  heater  has  cooled  down.  High-limit

thermal switches must be replaced once the circuit has been bro

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ken.

The high-limit thermal cutout device is a safety device only, not

intended for continuous operation. This device only operates when

a  problem  exists; ANY  condition  that  causes  high-limit  cutout

MUST be corrected immediately. High supply voltage also causes

excessive amperage draw, and may trip the circuit breaker or blow

the fuse(s) on incoming power supply.

After proper airflow and supply power are assured, regular filter

maintenance is important to provide clean air over the heater. Dirt

allowed to deposit on the heating element will cause hot spots and

eventual element burn through. These hot spots will normally not

be enough to trip the high-limit thermal cut-out device, and may

not be evident until actual heater element failure.

Cabinet/Control Box Maintenance Light

An optional Light-emitting Diode (LED) service light provides a

source of illumination in the main unit cabinet and the control box

during  routine  maintenance  and  troubleshooting in  dark ceiling

spaces.

When power is turned "OFF" for maintenance or troubleshooting,

the control box/cabinet light  will turn "ON" as soon as  control

box/cabinet door is open (see Fig. 28).

Electrical Wiring and Controls

Refer to wiring diagram attached to unit for type and number of

controls provided on each unit.

Verify integrity of all electrical connections at least twice during

the first year of operation. Subsequently, all controls must be in

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spected periodically for proper operation. Some components may

experience erratic operation or failure due to age. Wall thermostats

may also become clogged with dust and lint, and must be periodi

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cally inspected and cleaned to provide reliable operation.

When replacing any components such as fuses or relays, use only

the exact type, size and voltage component as furnished from the

factory. Any deviation without factory-authorization could result

in personnel injury or damage to the unit. This will also void all

factory warranties. Only factory supplied replacement parts ensure

that the  warranty and agency status remain in effect. All repair

work shall be done in such a manner as to maintain the equipment

in compliance with governing codes, ordinances and testing agen

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cy listings.

Drain

Inspect drain before initial start-up, and prior to each cooling sea

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son to assure that drain trap and line are clear. When clogged, clear

the debris so condensate easily flows. 

Periodically  inspect  drain  during  cooling  season  to  maintain  a

free-flowing condensate. Units are provided with a secondary or

“tell-tale” drain connection that will indicate a clogged main-drain

line by flow from “tell-tale” connection.

Should algae and/or bacteria growth become a concern, con

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sult an air conditioning and refrigeration supply organization

familiar  with  local  conditions  for  chemicals,  or  other  solu

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tions available to control these agents.

Filters — Throwaway

Throwaway type filters; commonly used on fan coil units must be

replaced on a regular basis. The time between replacement should

be  established  based  on  regular  inspection  of  filter,  and  also

recorded in the log for each unit. Refer to Table 4 for appropriate

filter dimensions compatible with each unit size. If replacement

filters are not purchased from factory, filters used should be the

same type and size as factory, or recommended by factory. Ex

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tended surface filters must not be used due to high air pressure

drops encountered with these types of filters being incompatible

with the type of fan coil unit covered in this manual. Consult fac

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tory for applications using filter types other than factory standard

or optional product.

Filters — Replacement and Installation

Each unit is equipped with return air filters. Filters must be period

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ically replaced.

The units' filters are 1 in., 2 in., or 4 in. thick. Filters can be easily

accessed from the side or bottom (42DH - horizontal unit) or side

and top (42DV - vertical unit) of the filter rack (see Fig. 31 or 32).

To remove filters from the side of the filter rack:

1. Remove the side access panel (A) of the filter rack by pulling

tab  at  the  bottom  (42DH)/top (42DV)  of the panel  to free

from magnets, and lower (42DH)/lift (42DV) it out of the slot

(B) in the top (42DH)/bottom (42DV) of the filter frame.

2. Pull out dirty filters.
3. Replace with new appropriate size filters.
4. To re-install side access panel into filter rack:

 a. Insert the tab of panel into the slot in filter frame's top

(42DH)/bottom (42DV) (B).

 b. Rotate  panel  toward  the  frame,  ensure  magnets  are

engaged.

To remove filters from the bottom of the filter rack (42DH):

1. Open  hinged  bottom  access  panel  (C)  -  pull  down  to

disengage magnets.

2. Pull out dirty filters.
3. Replace with new appropriate size filters.
4. Secure  bottom  access  panels,  make  sure  magnets  are  re-

engaged.

To remove filters from the top of the filter rack (42DV):

1. Open hinged top access panel (C) - pull up to disengage mag

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nets. 

2. Pull out dirty filters. 
3. Replace with new appropriate size filters.
4. Secure top access panels, make sure magnets are re-engaged.
The 42DH/DV units are designed to accept various filter sizes de

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pending on job requirements. Each filter frame is equipped with

filter support angle brackets (D) and 1 in. or 2 in. filter slots on all

four sides of filter frame. The filter support angle brackets (D) are

designed to provide guidance and support to the new filter as it is

being inserted.

In order to accommodate 1 in. and 2 in. filters, the bracket should

be inserted into corresponding slots on all sides of the filter frame

(see Fig. 31 or 32) and secured with screws. When 4 in. filter is

installed, the brackets should be stored for future use with different

filter thickness, or discarded if 4 in. filter will be always used.

Содержание 42DH

Страница 1: ...ns and have a fire extinguisher available Read these instructions thoroughly and follow all warnings or cautions attached to the unit Consult local building codes and appropriate national electrical c...

Страница 2: ...ity for per sonal injury or property damage resulting from improper or unsafe practices during the handling installation service or operation of any equipment CAUTION Disconnect all power prior to any...

Страница 3: ...confirm incoming and control power requirements match available power source Refer to unit nameplate and wiring diagram 1 Review all tags on unit to determine if shipping screws are to be removed Rem...

Страница 4: ...rnished and Installed 5 8 Knockouts For Suspension rods 4 Places top and 4 places Bottom of unit Threaded rod suspension Field Furnished and installed Trapeze Recommended on Unit size 30 Minimum Recom...

Страница 5: ...nces Top View 29 In Minimum Recommened Clearance 29 In Minimum Recommened Clearance 29 In Minimum Recommened Clearance Filter Piping Package For drain pan or coil removal the recommended clearance sho...

Страница 6: ...ouble wall cabi net construction For a different coil and cabinet options use the weight correction factor table Table 1 Total Unit Weight Adjustment NOTES 1 Unit weights shown in pounds 10 are based...

Страница 7: ...Fig 8 All hardware required for assembly is included and the base rails are letter coded for ease of assembly See Fig 9 Fig 8 Base Rails Fig 9 Letter Coding on Base Rail Parts PLACE UNIT ON THE BASE...

Страница 8: ...mixing box with supplied No 8 x 1 2 in sheet metal screws two per side See Fig 12 For bottom entering configurations length adjustments to the bot tom damper shaft may need to be completed prior to fi...

Страница 9: ...lter access panel See Fig 14 Fig 14 Optional Mixing Box 3 76 A C 2 4 61 4 102 H 2 4 61 3 76 1 25 2 51 2 51 W B Top Views BTM Rear Inlet 42DH Top Rear Inlet 42DH Top Front Inlet 42DV W 4 102 2 4 61 C 1...

Страница 10: ...rence at any point during travel Tighten rod clamp of swivel onto each damper rod Fig 17 Install Damper 7 Confirm correct operation of dampers Adjust as needed Tighten remaining fasteners Step 3 Conne...

Страница 11: ...5 1 2 0 625 1 2 0 625 16 22 1 1 125 1 1 125 1 1 125 1 1 125 1 2 0 625 30 1 1 2 1 625 1 1 2 1 625 1 1 2 1 625 1 1 2 1 625 1 2 1 625 HR CR CS HS Return Air Drain LH TELL TALE RH TELL TALE LEGEND 2 Verti...

Страница 12: ...16 1 LH 10 5 8 7 3 4 12 9 5 8 7 RH 13 3 8 9 5 8 7 2 12 7 16 3 8 13 5 8 10 3 8 7 9 16 6 7 3 4 15 5 8 8 1 8 1 LH 10 5 8 7 3 4 12 11 13 16 9 3 16 RH 13 3 8 11 13 16 9 3 16 2 12 7 16 3 8 13 5 8 12 1 2 9 3...

Страница 13: ...06 12 0 375 1 4 3 4 0 875 1 2 0 625 1 2 0 625 16 22 0 375 1 4 1 1 125 1 1 125 1 2 0 625 30 0 625 1 2 1 1 2 1 625 1 1 2 1 625 1 1 2 1 625 LEGEND HR HS SL LL Return Air Drain LH TELL TALE RH TELL TALE N...

Страница 14: ...1 2 2 3 4 6 1 4 5 1 8 17 1 8 3 3 4 2 5 8 2 5 8 6 2 4 4 7 8 3 1 4 3 1 4 6 16 4 6 1 2 7 1 8 12 1 2 2 3 4 6 1 4 5 1 8 17 1 8 3 3 4 2 5 8 2 5 8 6 2 4 6 3 8 10 13 5 8 6 6 8 4 1 8 2 5 8 6 20 22 4 6 1 2 7 1...

Страница 15: ...WIDTH HEIGHT SUPPLY DUCT RETURN DUCT MOUNTING HOLES AUX CTRL BOX M A B C D E F G J K L 06 9 x 6 36 28 19 3 4 8 7 8 10 7 8 13 3 4 2 1 4 24 1 4 14 2 3 4 27 1 4 35 1 4 5 3 4 2 08 9 x 6 36 28 19 3 4 8 7...

Страница 16: ...tors and or cabinet lighting option not required with low voltage 0 10v controls UNIT SIZE FAN SIZE DEPTH UNIT DEPTH WIDTH HEIGHT SUPPLY DUCT RETURN DUCT MIX BOX MOUNTING HOLES AUX CTRL BOX M A B C D...

Страница 17: ...g UNIT SIZE FAN SIZE DEPTH WIDTH HEIGHT SUPPLY DUCT FLANGE RETURN DUCT FLANGE AUX CTRL BOX UNIT SIDE TO DUCT FLANGE UNIT BOTTOM TO DUCT FLANGE A B C E F L M N 06 9 x 6 20 28 36 1 2 8 7 8 10 7 8 15 1 8...

Страница 18: ...field installation of actuator Kit consists of 2 crank arms 2 swivels and either a 25 in sizes 06 16 or 34 in sizes 20 30 length of 5 16 in rod 10 Add 2 in if using a prefilter or 4 in filter UNIT SIZ...

Страница 19: ...ld wiring shall be made in compliance with all governing codes and ordinances Compliance with all codes is the responsibility of the installing contractor All components furnished for field installati...

Страница 20: ...sible before beginning any system balancing Cooling Heating System Prior to the water system start up and balancing flush the chilled hot water systems to clean out dirt and debris which may have coll...

Страница 21: ...tronically Commutated Motors ECM constant speed brushless DC which are easily adjustable in the field for desired performance Motors are pre programmed for constant speed mode 1 2 HP and 1 HP motors h...

Страница 22: ...low rates in a convenient place for future reference Before and during water system balancing conditions may exist due to incorrect system pressures which may result in noticeable water noise or undes...

Страница 23: ...air through the coil fins from the leaving air face This should again be followed by vacuuming Units equipped with regularly replaced air filters will require less frequent coil cleaning Electric Res...

Страница 24: ...ed main drain line by flow from tell tale connection Should algae and or bacteria growth become a concern con sult an air conditioning and refrigeration supply organization familiar with local conditi...

Страница 25: ...Detail Y Detail Y Filter Support Angle Bracket Filter Support Angle Bracket 1 Filter Slot 2 Filter Slot D See Detail Y See Detail X Detail X Detail Y Magnets C 2 Filter 1 Filter 4 Filter B A D 2 Filt...

Страница 26: ...h Control Board Fig B No Electric Heat Three Phase Power with Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM attached to the unit WARNING Wiring d...

Страница 27: ...WIRING DIAGRAM EXAMPLES cont Fig C Single Element Heater Single Stage Heat Single Phase Power with Control Board WARNING Wiring diagrams are pro vided as an example only ALWAYS refer to WIRING DIAGRAM...

Страница 28: ...28 Fig D Two Element Heater Single Stage Heat Single Phase Power with Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM attached to the unit...

Страница 29: ...CAL WIRING DIAGRAM EXAMPLES cont Fig E Two Element Heater Two Stage Heat Single Phase Power with Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM at...

Страница 30: ...30 Fig F Three Element Heater Single Stage Heat Three Phase Power with Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM attached to the unit...

Страница 31: ...AL WIRING DIAGRAM EXAMPLES cont Fig G Six Element Heater Single Stage Heat Three Phase Power with Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM a...

Страница 32: ...32 Fig H Six Element Heater Two Stage Heat Three Phase Power with Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM attached to the unit...

Страница 33: ...L WIRING DIAGRAM EXAMPLES cont Fig I Nine Element Heater Single Stage Heat Three Phase Power with Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM a...

Страница 34: ...34 Fig J Nine Element Heater Two Stage Heat Three Phase Power with Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM attached to the unit...

Страница 35: ...Power with Control Board Fig L No Electric Heat Single Phase Power without Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM attached to the unit WA...

Страница 36: ...Board Fig N Single Element Heater Single Stage Heat Single Phase Power without Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM attached to the unit...

Страница 37: ...L WIRING DIAGRAM EXAMPLES cont Fig O Two Element Heater Two Stage Heat Single Phase Power without Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM a...

Страница 38: ...38 Fig P Three Element Heater Single Stage Heat Three Phase Power without Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM attached to the unit...

Страница 39: ...WIRING DIAGRAM EXAMPLES cont Fig Q Six Element Heater Single Stage Heat Three Phase Power without Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM...

Страница 40: ...40 Fig R Six Element Heater Two Stage Heat Three Phase Power without Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM attached to the unit...

Страница 41: ...WIRING DIAGRAM EXAMPLES cont Fig S Nine Element Heater Single Stage Heat Three Phase Power without Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM...

Страница 42: ...42 Fig T Nine Element Heater Two Stage Heat Three Phase Power without Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM attached to the unit...

Страница 43: ...WIRING DIAGRAM EXAMPLES cont Fig U Nine Element Heater Three Stage Heat Three Phase Power without Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM...

Страница 44: ......

Страница 45: ......

Страница 46: ...the right to discontinue or change at any time specifications or designs without notice and without incurring obligations Catalog No 04 53420022 01 Printed in U S A Form 42DHV 2SI Pg 46 1 22 Replaces...

Страница 47: ...Y N __________ ARE FURNISH ONLY PARTSACCOUNTED FOR Y N __________ IS THE UNIT ARRANGEMENT HAND CORRECT Y N __________ IS THE UNIT STRUCTURAL SUPPORT COMPLETEAND CORRECT Y N __________ Handling and Ins...

Страница 48: ...YTRAP IS DEEP ENOUGH __________ PRIME THE TRAPWITH WATER __________ CHECK SUPPLYAND RETURN WATER CONNECTIONS FOR LEAKS __________ FILL SYSTEMS WITH WATER REFRIGERANT __________ OPENAIR VENT ON TOP OF...

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