Install Instructions

Installation & Service Manual
5 Electrical connections (continued)
35
IMG00282
A
DETAIL A
UPPER FRONT
JACKET PANEL
OUTER
AIR DEFLECTOR
LOWER FRONT
JACKET PANEL
HEX FILLER
BRACKET
FLAME ROLL-OUT /
INTERLOCK SWITCH
Figure 5-4_Flame Roll-Out / Flame Interlock Switch
Location
A
DETAIL A
BLOCKED VENT SWITCH
(INVERTED TO SHOW
RESET UNDERNEATH)
DRAFT HOOD
F
R
O
N
T
O
F
U
N
I
T
IMG00281
Figure 5-3_Blocked Vent Switch Location
Temperature Adjustment
NOTICE
The temperature controller is pre-set at
the factory with test settings. You may
need to adjust the settings to meet your
specific needs.
 WARNING
Return water temperatures must not be
less than 140°F. If lower return water
temperatures are required, follow the
instructions for Low Temperature Bypass
Requirements, see page 28.
In Compliance with Energy Conservation Standards, the
Solution boiler comes equipped with outdoor air reset, a
feature that increases the temperature setting of the boiler as
outside temperatures drop and decreases the boiler set point as
outdoor temperatures rise. To use this feature, the outdoor air
sensor provided with the boiler must be properly installed. If
the sensor or sensor wiring is defective, a flashing LED light on
the controller will signify the feature is not functioning (FIG.
5-5). A boiler that is not receiving input from the outdoor air
sensor will operate at maximum set point until the sensor is
reconnected.
The temperature controller calculates boiler set point using the
outdoor air temperature and the outdoor air reset curve. The
curve is adjustable and defined by the maximum and minimum
set points. An appropriate operating set point is based
on individual system’s requirements. Refer to Temperature
Control Settings for help with set point determination.
The boiler water sensing element is factory installed in the inlet
bulbwell on the heat exchanger. An optional system sensor
may be installed for use as a remote sensor in a boiler system.
The boiler set point can be adjusted by using the maximum
set point dial to modify the outdoor air reset curve. To ensure
proper operation, use the temperature and pressure gauge
located in the header of the heat exchanger to observe the
boiler discharge temperature and system water pressure after
set point adjustment.
MAX SETPOINT °F
200
OFF
MIN SETPOINT °F
150
17
0
18
0
190
160
110 140
120 130
115
125
135
20
15
10
5
HIGH-FIRE
OFFSET °F
0
TST20036
CN2
CN7
CN8
CN3
CN4
CN5
CN6
(c)2002 L.C.
PUMP
RELAY
INLET
PROBE
SYS/
TANK
(c)2002 L.C.
LED1
CN12
TANK
AQUA-
STAT
FAULT
OUTDOOR
SENSOR
CN11CN10
W2
W3
W1
CN9
CN1
TST20036-1
TST20036-2
OUTDOOR AIR SENSOR
FAULT INDICATION
IMG00275
Figure 5-5_Two-Stage Thermostat