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ELECTRICAL RATINGS:
Voltage and frequency: 20.5 to 28.5 V (24 V nom.), 60
Hz.
Current rating: 0.2 A.
Gas control contact ratings (at 24 Vac): 2.0 A running,
20.0 A inrush.
IGNITER WARM-UP PERIOD: 34 sec., nom.
THERMOSTAT ANTICIPATOR SETTING: 0.2 A plus gas
control current rating.
AMBIENT TEMPERATURE RATING: Minus 40° F to
+175° F [minus 40° С to +79° С].
RELATIVE HUMIDITY RATING: 5 to 90 percent at 95° F.
FLAME FAILURE RESPONSE TIME: 2 sec. max. with a
2.5 pA flame signal.
FLAME CURRENT: 0.8 pA DC, min.
TERMINALS: 1/4 in. male quick connects for line voltage
and sensor connections; 3/16 in. male quick connects
for all low voltage connections. Terminal options (spec
ify when ordering):
* Molex plug for connection to D80D Vent Damper.
•
10 in. [250 mm] min. color-coded leadwires for all
line voltage connections.
MOUNTING: Mounts in any position. Fasten with No. 6-32
machine or No. 8 sheetmetal screws, 1 in. long.
DIMENSIONS: See Fig. 1.
UNDERWRITERS LABORATORIES INC. COMPONENT
RECOGNIZED: FILE NO. MP268, Guide No. MCCZ2.
CANADIAN GAS ASSOCIATION CERTIFIED: 1029-ABI-
6218.
AMERICAN GAS ASSOCIATION CERTIFIED: 20-20B1.
OTHER SYSTEM CONTROLS
The S89 and S890 provide operating control of a direct
ignition system using a hot surface igniter. Additional
components required to complete the system must be
ordered separately. They include:
DUAL VALVE COMBINATION GAS CONTROL: Any di
rect ignition gas control with 2.0 A max. main valve
A
MOLEX PLUG AND TH-W TERMINAL
ON VENT DAMPER MODELS ONLY.
A
SENSE TERMINAL ON D AND H
MODELS ONLY.
A
LEADWIRE MODELS HAVE 4
LEADWIRES IN PLACE OF LINE
VOLTAGE TERMINALS.
FIG. 1—APPROXIMATE S89/S890 DIMENSIONS IN In. [mm IN BRACKETS],
rating. VR8205, VR845, VR854, VR8450 or VR8540
recommended.
HOT SURFACE IGNITER OR IGNITER-SENSOR: Nor
ton Model 201 or 271 or equivalent.
NOTE: If igniter other than Norton Model 201 or 271 is
used, the igniter must meet the following minimum
specifications, required over the life of the igniter:
• Igniter must reach 1000° С [1832° F] within 34
seconds with 102 Vac applied.
• Igniter must maintain at least 500M ohms insulation
resistance between the igniter leadwires and the
igniter mounting bracket.
• Igniter must not develop an insulating layer on its
surface (over time) which would prevent flame
sensing.
• Igniter surface area immersed in flame must not
exceed 1 /4 of the grounded area im mersed in f lam e.
This would prevent flame sensing.
• Igniter current draw at 132 Vac must not exceed 5 A.
SENSOR: Separate sensor required for all S89D,H and
S890D.H. Honeywell Q354 recommended.
IGNITER WIRING: Provide wiring harness to suit applica
tion.
• Leadwires: No. 18 AWG, stranded copper with
105° С rated 1/16 in. PVC insulation.
• Terminals: Insulated 1/4 in. female quick connects
or solderless connectors to module (depending on
module) and suitable connector to igniter.
TRANSFORMER: Add current ratings of module, gas
control, vent damper and any other components of the
control system to determine transformer size require
ment.
THERMOSTAT: Compatible with any Honeywell 24 V
thermostat and with competitive 24 V thermostats that
are powered independently of the module.
HIGH LIMIT AND OTHER AUXILIARY CONTROLS: As
specified by the heating appliance manufacturer.
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