BG801UH Installation Manual

507330-01BPage 24 of 33 Issue 1809
Unit Start-Up
FOR YOUR SAFETY, READ BEFORE LIGHTING UNIT
Do not use this furnace if any part have been
underwater. Immediately call a licensed professional
service technician (or equivalent) to inspect the furnace
and to replace any part of the control system and any
gas control which has been underwater.
WARNING
If overheating occurs or if gas supply fails to shut off,
shut off the manual gas valve to the appliance before
shutting off electrical supply.
WARNING
Before attempting to perform any service or
maintenance, turn the electrical power to unit OFF at
disconnect switch.
CAUTION
Figure 32. Integrated Control
(Automatic Hot Surface Ignition System)
Terminal Designations
120 HUM Humidier (120 VAC)
LINE Input (120 VAC)
XFMR Transformer (120 VAC)
CIRC Indoor Blower (120 VAC)
EAC Electronic Air Cleaner (120 VAC)
COOL Blower - Cooling Speed (24 VAC)
HEAT Blower - Heating Speed (24 VAC)
FAN Blower - Fan Speed (24 VAC)
PARK Dead terminals to park all speed taps
NEUTRALS Neutral Terminals (120 VAC)
FS Flame Sense
24 COM Common (24 VAC)
HUM 24 Humidier (24 VAC)
RED LED
RECALL BUTTON
BLOWER OFF DELAY
Figure 33. Heating Sequence of Operation
Demand
15
ON
OFF
CAI
35
1
Pre-Purge
Ignitor Warm-up
Blower
“On” Delay
Post
Purge
5 SEC80
Ignitor
Gas Valve
Indoor Blower
39
Trial for
Ignition
Blower on time will be 45 seconds after gas valve is energized. Blower off time will depend on “OFF TIME” Setting.