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Page 5

A

C

D

ADJUSTABLE

LOUVERS

FRONT VIEW

COMBUSTION AIR

INDUCER

DIRECT DRIVE FAN

GAS VALVE

SIDE VIEW

HEAT

EXCHANGER

AIR

FLOW

ELECTRICAL /

THERMOSTAT

INLETS

FLUE OUTLET

TOP VIEW

(4) 3/8-16 MOUNTING NUTS

FOR UNIT SUSPENSION

16 (406)

1/2 (13)

5-3/8

(137)

B

1/2 (13)

31-7/8 (810)

10-5/8

(270)

35-1/4

(895)

10-1/2

(267)

2-1/2 (64)

3-1/8 (79)

UHCM

-125 / 200 DIMENSIONS - Inches (mm)

Model 

No.

A

B

C

D

in.

mm

in.

mm

in.

mm

in.

mm

UHCM

-125 

UHCM

-150

19-1/2

495

18-1/2

470

12-1/4

311

4-3/4

121

UHCM

-175 

UHCM

-200

25

635

23-3/4

603

9-1/2

241

3

76

Summary of Contents for UHCM-125

Page 1: ...Installation and service must be performed by a licensed professional installer or equivalent service agency or the gas supplier CAUTION As with any mechanical equipment personal injury can result from contact with sharp sheet metal edges Be careful when you handle this equipment INSTALLATION INSTRUCTIONS UH RS CM 30 000 to 400 000 Btuh Series UNIT HEATERS 507938 05 7 2021 Supersedes 507938 04 Not...

Page 2: ...d Shipping and Packing List UNIT HEATER BAG ASSEMBLY REMOVE BRACKETS SECURING UNIT TO SHIPPING CRATE BEFORE INSTALLATION FLUE TRANSITION BURNER BOX HOOD 125 400 Units Package 1 of 1 contains 1 Unit Heater 1 Burner box hood 1 Rectangular to round flue transition 4 diameter on 125 150 factory installed 5 diameter on 175 300 provided and field installed 6 diameter on 350 400 provided and field instal...

Page 3: ...ANGER AIR FLOW MOUNTING SLOTS Typical 5 16 x 3 Inches 8 x 76 mm HANGING BRACKETS 2 SERVICE ACCESS PANEL SIDE VIEW ADJUSTABLE LOUVERS 1 25 UHRS 030 105 DIMENSIONS Inches mm THERMOSTAT INLET Model No A B C D in mm in mm in mm in mm UHRS 030A UHRS 045A 12 3 8 314 6 1 2 165 4 102 6 152 UHRS 060A UHRS 075A 17 1 2 445 6 1 4 159 6 1 8 156 3 5 8 92 UHRS 090A UHRS 105A 23 584 7 7 8 200 9 1 8 232 3 5 8 92 ...

Page 4: ...Page 4 ...

Page 5: ...NLETS FLUE OUTLET TOP VIEW 4 3 8 16 MOUNTING NUTS FOR UNIT SUSPENSION 16 406 1 2 13 5 3 8 137 B 1 2 13 31 7 8 810 10 5 8 270 35 1 4 895 10 1 2 267 2 1 2 64 3 1 8 79 UHCM 125 200 DIMENSIONS Inches mm Model No A B C D in mm in mm in mm in mm UHCM 125 UHCM 150 19 1 2 495 18 1 2 470 12 1 4 311 4 3 4 121 UHCM 175 UHCM 200 25 635 23 3 4 603 9 1 2 241 3 76 ...

Page 6: ...LOW SIDE VIEW COMBUSTION AIR INDUCER DIRECT DRIVE FAN GAS VALVE HEAT EXCHANGER 16 406 1 2 13 31 7 8 810 10 5 8 270 5 3 8 137 10 1 2 267 1 2 13 35 1 4 895 3 76 2 5 8 67 3 1 8 79 UHCM 250 400 DIMENSIONS Inches mm Model No A B C in mm in mm in mm UHCM 250 UHCM 300 37 5 8 956 36 1 2 927 15 7 8 403 UHCM 350 UHCM 400 47 1194 45 3 4 1162 20 1 2 521 ...

Page 7: ...Page 7 ...

Page 8: ... jurisdiction should be consulted before installation The installation must conform with local building codes or in the absence of local codes with the current edition of CSA B149 installation compliance codes All electrical wir ing and grounding for the unit must also comply with the current edition of CSA C22 1 Canadian Electrical Code These unit heaters are CSA certified for the installation cl...

Page 9: ...52 UHCM 125 400 UNITS Four mounting nuts are furnished Refer to dimension illustration Mounting nuts will accommodate 3 8 x 16 threaded rods CAUTION Do not install unit heaters in close proximity to fire sprinklers Unit heater normal operating temperatures could result in fire sprinkler activation 1 Push each louver to the left to depress spring and release locking tab on the other end locking tab...

Page 10: ...Page 10 FIGURE 2 FIGURE 3 ...

Page 11: ...SHOWN FIGURE 4 RotationofCombustionAirInducer UHCM 125 150Only The combustion air inducer on UHCM 125 150 may be rotated 90 either to the left or right of the original vertical position in order to better suit the application NOTE It is not permissible to rotate the combustion air inducer on UHRS 030 105 and UHCM 175 400 Rotate the combustion air inducer assembly as follows 1 Remove the heater fro...

Page 12: ... 175 400 Units A sheet metal transition is supplied with this certified unit It must not be modified or al tered and must be installed on the outlet of the com bustion air inducer assembly prior to the installation of the vent connector Failure to comply with this re quirement will void the certification of the unit by the approval agencies Note Different manufacturers have different joint systems...

Page 13: ...e wall metal pipe may be used as a vent connector between the unit heater and the vertical gas vent in all applications however single wall metal pipe cannot be used for vertical gas vent in residential applications 3 Keep the vent connector runs as short as possible with a minimum number of elbows Refer to the current edition of ANSI Z223 1 or CSA B149 installation compliance codes for maximum ve...

Page 14: ...ermination from direct winds 5 Vent terminations must be free from obstructions and at least 12 305mm above grade level and maximum snow height 6 Do not install a horizontal vent termination directly below roof eaves or above a public walkway or any other area where condensate dripping may be troublesome and may cause some staining Avoid windows where steam may cause fogging or ice buildup 7 Minim...

Page 15: ...MMON VENTING NOT ALLOWED WHEN HORIZONTALLY VENTING THE UNIT HEATER COMBUSTION AIR INDUCER Category III adaptor must be installed before optional elbow if used LISTED WALL THIMBLE THROUGH COMBUSTIBLE WALL NOTE Minimum horizontal vent length is 5 ft This does not include termination tee Refer to table 4 for maximum length and number of elbows VENT TERMINATION TEE DRAIN TEE DRAIN LOOP PROVIDED BY INS...

Page 16: ...he roof surface with a listed cap or a listed roof assembly in accordance with the terms of their respective listings and the vent manufacturer s instructions 4 Do not install a manual damper barometric draft regulator or flue restrictor between the unit heater and the chimney 5 If type B1 double wall vent is used inside a chimney no other appliance can be vented into the chimney Outer wall of typ...

Page 17: ...hat each appliance remaining connected to the common venting system properly vents when tested as outlined above return doors windows exhaust fans fireplace dampers and any other gas burning appliance to their previous condition of use 7 If improper venting is observed during any of the above tests the common venting system must be corrected The common venting system should be resized to approach ...

Page 18: ...own in figure 11 On 030 105 units use pigtails provided in power entry box On 125 400 units connect wires to 2 pin P366 plug located on the A3 ignition control board For ease of installation disconnect P366 plug from J366 make wire connections and replace P366 Refer to wiring diagram on unit and the appropriate typical diagram in this manual HIGH VOLTAGE WIRING A3 IGNITION CONTROL L1 N GND FIELD P...

Page 19: ...OM 8 S 47 7 S 195 9 S 10 5 S 18 11 GV C 12 GV H 2 S 47 1 S 195 3 S 10 4 S 18 6 GV M COM M GRY W HT W HT W HT W HT W HT BL U BL U PNK BRN 537992 02 1 0 537992 02 LOW VOLTAGE THERM OSTAT CONNECTI ONS P367 J 367 HEAT W 1 BLOW ER G 24V POW ER R 24V COM M ON C J 363 2 1 3 5 6 24VAC I N R OUT L1 N GND C G W 1 W 2 1 4 A3 I GN CTRL OUT 24VAC I N 1 FI ELD PROVI DED CLASS I I 24VAC THERM OSTAT W I RI NG L1 ...

Page 20: ... N 5 F AN2 GND 8 F AN2 L 1 GRN YE L W HT BL K F L AM E S E NS NO COM W HT 8 S 47 7 S 195 9 S 10 5 S 18 11 GV C 12 GV H 2 S 47 1 S 195 3 S 10 4 S 18 6 GV M COM M BL U BL U PNK BRN 538025 02 2 0 538025 02 LOW VOLTAGE THERM OSTAT CONNECTI ONS P367 J 367 HEAT W 1 BLOW ER G 24V POW ER R 24V COM M ON C J 363 1 3 5 6 24VAC I N R OUT L1 N GND C G W 1 W 2 1 4 A3 I GN CTRL OUT 24VAC I N 1 FI ELD PROVI DED C...

Page 21: ...1 BRN 2 F AN2 N 5 F AN2 GND 8 F AN2 L 1 GRN YE L W HT BL K W HT GRN YE L BL K F L AM E S E NS NO COM 8 S 47 7 S 195 9 S 10 5 S 18 11 GV C 12 GV H 2 S 47 1 S 195 3 S 10 4 S 18 6 GV M COM M BLU BLU BL U PNK BRN 538024 02 2 0 538024 02 LOW VOLTAGE THERM OSTAT CONNECTI ONS P367 J 367 HEAT W 2 HEAT W 1 BLOW ER G 24V POW ER R 24V COM M ON C J 363 1 3 5 6 24VAC I N R OUT L1 N GND C G W 1 W 2 1 4 A3 I GN ...

Page 22: ... a manual main shutoff valve and union furnished by installer be installed external to the unit Union must be of the ground joint type A drip leg should be readily accessible to per mit cleaning and emptying See figure 12 NOTE If a switch box is mounted over electrical knock outs on back of unit leave a minimum of 4 102mm clearance between switch box and drip leg A 1 8 NPT plugged tap shall be ins...

Page 23: ...n the building there may be smoke on start up WARNING Danger of explosion Can cause injury or product or property damage You must follow these instructions exactly BEFORE LIGHTING smell all around the appliance area for gas Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor Use only your hand to move the switch Never use tools If the switch will no...

Page 24: ...FF then back to Heat Heat ing sequence then restarts at step 1 6 The burners must light without noticeable crossover delay There must be no flame lifting from the burner heads flashback or burning within the burner The flames should be predominantly blue in color and should be approximately centered in the tubes with no apparent impingement taking place 7 Theignitioncontrolwillenergizethefanapprox...

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Page 26: ...easuring device to measure supply pressure 3 Open manual main supply valve 4 Ignite unit and let run for 5 minutes to allow for steady state conditions 5 After allowing unit to stabilize for 5 minutes record supply pressure NOTE On multiple unit installations each unit should be checked separately with and without other units operating Sup ply pressures on both single and multiple unit installatio...

Page 27: ...Air Shutters Properly Adjusted If Installed Flue Connections Tight THERMOSTAT Calibrated Heat Anticipator Properly Set Level Manifold Pressure Blower Motor Amps Blower Motor Lubrication O K Gas Piping Connections Tight Leak Tested State Province Fan Timer Operation Checked w c Job Name Job Location Installer Unit Model No Supply Voltage Furnace Btu Input Line Pressure FLUE PASSAGEWAY AND FLUE BOX ...

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