Reznor UDBS Unit Installation Manual - Manual (Page 7)

Form I-UDB, P/N 202658 R14, Page 7
High Altitude Kit, Option DJ20 or DJ21
If the heater is being installed at an elevation above 2000 ft (610M), the input rate will
have to be derated. This is done by adjusting the valve outlet pressure.
In addition, if the heater is being installed at an altitude above 6000 ft (1830M), the
pressure switch will have to be changed. If ordered with the unit as Option DJ20 or
DJ21, the pressure switch is shipped separately for field installation.
Adjusting the valve outlet pressure is done after the heater is in operation; follow the
instructions in Paragraph 6.1 . Capacities and inputs for derated units are also listed in
Paragraph 6.1.
Gas valve adjustment
for high altitude can
only be done after
heater is operating;
see Paragraph 6.1.
Model UDB Size 150-200 225-250 300-400
Shipped-Separate Package P/N for 460V/3ph Supply 198503 198504 198505
460V - 120V Transformer P/N 11100
Shipped-Separate Package P/N for 575V/3ph Supply 198506 198507 198508
575V - 120V Transformer P/N 202056
Components of both the 460V and the 575V Shipped-Separate Pacakge (above):
Description of Parts Qty P/N’s
3/8” x 3/4” long Hex Head Cap Screw 1 32253
3/8” Lockwasher 1 5197
3/8” Flat Washer 2 6593
BX Cable 3/8” 1 63292 (49”) 10460 (56”) 201465 (70”)
Straight Connector 1 16202
90° Connector 1 1417
Anti-short Bushing 2 16358
Black Wire 14 GA, 105°C 1 123150 (65”) 48862 (72”) 201466 (86”)
White Wire 14 GA, 105°C 1 123152 (65”) 48861 (72”) 201467 (86”)
Green Wire14 GA, 105°C 1 201468 (65”) 201462 (72”) 201469 (86”)
Cable Clamp, 1/2” 1 16227
#10 X 1/2” long Sheetmetal Screw 3 11813
Twist-on Wire Connector 10 16354
3.2 Preparing for
Installation
If the installation includes optional vertical louvers, downturn nozzle, polytube adapter,
duct flange, belt guard, blower guard, hanger kit, high altitude kit, multiple heater
control, sensor for DDC control, and/or stepdown transformer, install these options
before the heater is suspended. Complete instructions are in this form or in the
option package; option packages are shipped separately.
Other shipped separate items could include a vent cap (Option CC1 for UDBP); a vent/
combustion air kit (Option CC2 or CC6 for UDBS); a manual gas valve; a thermostat
bracket kit; a thermostat; and/or a thermostat guard.
Be sure all options ordered are at the installation site.
Read this booklet and become familiar with the installation requirements of your par-
ticular heater. If you do not have knowledge of local requirements, check with the local
gas company or any other local agencies who might have requirements concerning
this installation. Before beginning, make preparations for necessary supplies, tools,
and manpower.
IMPORTANT: Shipping brackets are attached with cabinet screws. When remov-
ing shipping brackets, re-insert ALL screws into the cabinet.
To protect the unit during shipping, the heater has supports that must be removed
before installation. Follow these instructions to remove:
□
Blower Support Legs - Remove the two blower support legs and screws.
□
Motor Shipping Block (belt drive units) - Remove the wooden block located under
the motor bracket. Find the two rubber bushings shipped in the “Literature Bag”.
Place the bushings on the ends of the motor bracket bolts.
□
Motor Shipping Plate - Models equipped with belt drive motors of 3/4 HP or less
have a metal shipping plate attached between the motor and the blower housing.
Remove and discard the shipping plate. NOTE: On units factory equipped with an
optional belt guard, the belt guard must be removed in order to reach the shipping
the plate.
Field-Installed Parts
If installing a Model UDBP or UDBS 150-400 ordered for use with 460 or 575 supply
voltage, a field-installed 500VA transformer is shipped separately. Be sure the trans-
former is there and follow the instructions in Paragraph 7.2 to attach it to the factory-
installed bracket.