Qmark CRN - Industrial Permanent Infrared Heaters - Manual (Page 3)

MAINTENANCE
The reflectors should be kept clean to obtain the maximum
radiant output.
Element Replacement
1. Remove Terminal Box Cover.
2. Disconnect lead wires from heater terminals and disengage
box from conduit /cable fitting.
3. Remove safety grills (if installed).
4. Loosen (2) 3/8” nuts from the terminal box bracket located on
the back of the heater and slide the entire heating element
assembly out of the reflector assembly.
5. Remove bulkhead fitting nut and washers.
6. Remove failed element and replace with a new element.
7. Place gasket on the bulkhead fitting and insert terminals and
fitting into the element hole in the terminal box.
8. Place washer and nut on the bulkhead fitting and tighten.
9. Reassemble by following the reverse procedures (steps 4
through 1)
WIRING
1. Use heater only at the voltage specified on the nameplate.
2. Branch circuit wire for connection to heater must be at least
90°C wire. Use copper conductors only.
3. The heater connection points are located in the gasketed
terminal enclosure. To remove cover, remove 4 screws on
the cover. Remove the cover to expose wiring connection
points.
4. A green ground terminal is provided in the bottom of the
enclosure. The ground wire should be connected before
other connections are made.
5. Refer to Table 1 for proper entrance wiring size.
6. Heater can be wired with rigid or flexible conduit.
ELECTRIC SHOCK HAZARD. Disconnect all power before
installing or servicing heater. Failure to do so could result in
personal injury or property damage. Heater must be
effectively grounded in accordance with the National Electrical
Code, NFPA 70.
a WARNING
All electrical wiring must be done by a qualified person in
accordance with National Electrical Code (NEC) and meet all
state and local regulations.
a WARNING
Grill Kit Selection Guide
Model Volts Watts Optional Grill Kit
N1011B 120 1000
N1081B 208 1000 NWG01
N1021B 240 1000
N1511B 120 1500
N1581B 208 1500
N1521B 240 1500 NWG105
N1571B 277 1500
N1531B 347 1500
N2001B 208 2000
N2021B 240 2000
NWG200
N2071B 277 2000
N2031B 347 2000
N2501B 208 2500
N2521B 240 2500
NWG250
N2571B 277 2500
N2531B 347 2500
ELECTRIC SHOCK HAZARD. Disconnect all power before
servicing or replacing heating elements.
a WARNING
Replacement Parts
Model Volts Watts Element
N1011B 120 1000 322-074905-143
N1081B 208 1000 322-074905-144
N1021B 240 1000 322-074905-145
N1511B 120 1500 322-074905-148
N1581B 208 1500 322-074905-149
N1521B 240 1500 322-074905-150
N1571B 277 1500 322-074905-151
N1531B 347 1500 322-074905-152
N2001B 208 2000 322-074905-153
N2021B 240 2000 322-074905-154
N2071B 277 2000 322-074905-155
N2031B 347 2000 322-074905-156
N2501B 208 2500 322-074905-157
N2521B 240 2500 322-074905-158
N2571B 277 2500 322-074905-159
N2531B 347 2500 322-074905-160
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Hanging Kit for All Models: MHK