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and the 24V terminal
on the module.
To change out a
module with TH-R, TH-W terminals:
1. Remove the wires from the 25V(2) and TH-R termi-
nals on the old module. Connect these two wires with a
solderless connector.
2.Tag
and remove the remaining
wires from the old
module.
3. Remove the old module and mount the new one in the
same location.
4. Reconnect the remaining wires as shown in Table 5.
5. Increase the thermostat
anticipator
setting by 0.2 A.
TABLE 5-TERMINAL
CROSS REFERENCE.
TERMINAL
ON
TERMINAL
ON
OLD MODULE:
NEW MODULE:
25V(l)
24V(GND)
TH-W
24V
MV
MV
MVIPV
MVIPV
PV
PV
GND(Burner)
GND(Burner)
r
S66CvX.H.M;
S8610F.H;
S866OD; Sffi70D
1
GND
24V
TH-W
A
VENT
DAMPER
1
-
MAIN
DUAL VALVE COMBINATION
GAS CONTROL
FIG. 2-S8600F,H,M;
S661 OF,H; S6666D; S8670DCONNECTlONS
IN
A HEATING SYSTEM WITHAN ATMOSPHERIC
BURNER.
0345.
0346,
0346. Q3is.
a361
PILOT BURNER/
IGNITER-SENSOR
PILOT BURNER
A
POWER SUPPLY.
PROVIDE
DISCONNECT
MEANS
AND OVERLOAD
PROTECTION
AS REQUIRED.
&
ALTERNATE
LIMIT CONTROLLER
LOCATION.
A
MAXIMUM
CABLE
LENGTH
3 fi [0.9 m],
)&
CONTROLS
IN 24VClRCUlT
MUST NOT BE IN GROUND
LEG TO
TRANSFORMER.
h
FOR MODULE
WITH TH-W TERMINAL
AND VENT DAMPER
PLUG, CONNECT
THERMOSTAT
TO TH-W.
LEAVE 24V OPEN.
DD NOT REMOVE
VENT
DAMPER
PLUG.
Ml175A
7
68-0085-2
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