Start- -Up, Adjustments And Safety Check; General; Select Setup Switch Positions - Carrier 58UVB series Installation, Start-Up, And Operating Instructions Manual

CONDENSATE TRAP
WIRE TIE(S)
HEAT TAPE
(3 WRAPS MINIMUM)
Fig. 38 --- Condensate Trap Heat Tape
START- -UP, ADJUSTMENTS AND SAFETY
CHECK
Step 1 —General
1. Furnace must have a 115- -v power supply properly
connected and grounded.
NOTE: Proper polarity must be maintained for 115- -v wiring. If
polarity is incorrect, control status indicator light flashes rapidly
and furnace does not operate.
2. Thermostat wire connections at terminals R, W/W1, G,
and Y/Y2 must be made at 24- -v terminal block on furnace
control.
3. Natural gas service pressure must not exceed 0.5 psig
(14- -in. wc), but must be no less than 0.16 psig (4.5- -in.
wc).
4. Blower access panel must be in place to complete 115- -v
electrical circuit to furnace.
!
UNIT MAY NOT OPERATE
Failure to follow this caution may result in intermittent unit
operation or performance satisfaction.
These furnaces are equipped with a manual reset limit
switch in burner box. This switch opens and shuts off
power to the gas valve if an overheat condition (flame
rollout) occurs in burner enclosure. Correct inadequate
combustion- -air supply or improper venting condition
before resetting switch. DO NOT jumper this switch.
A93036
Before operating furnace, check flame rollout manual reset switch
for continuity. If necessary, press button to reset switch.
Step 2 —Select Setup Switch Positions
AIR CONDITIONING (A/C) SETUP SWITCHES
The air conditioning setup switches are used to match furnace
airflow to cooling unit used.
To set the desired cooling airflow:
1. Remove main furnace door and blower access panel.
2. Locate A/C setup switches on furnace control. (See Fig.
33.)
33
CAUTION