Honeywell ST7997 Bedienungsanleitung PDF herunterladen

X-XX UL

INSTALLATION INSTRUCTIONS

Molex® is a registered trademark of Molex Incorporated.

69-1204

ST7997

Oil Burner Mounted Electric Fan Timer

APPLICATION

The ST7997 Oil Burner Mounted Electric Fan Timer

integrates control of burner and circulator fan operations in

an oil furnace and is the central wiring point for most

electrical components in the furnace. The ST7997 mounts

on a standard four-inch by four-inch junction box typically

located on the oil burner. When used with the R7997

Integrated Oil Primary Controller and Ignitor, it provides

simplified wiring and field serviceability. The basic

purposes of the ST7997 are to monitor the thermostat for

heat, cool and fan demands, run the oil burner primary

control and run a two-speed circulating fan, as required.

The ST7997 also monitors a limit switch string that

energizes the circulating fan when the limit switch opens.

The ST7997 provides electronic air cleaner (EAC) and

humidifier (HUM) terminal connections for field installation

convenience.

SPECIFICATIONS

Electrical

Input Ratings

Supply Voltage:

102 to 132 Vac (120 Vac nominal), 60 Hz.

Supply Current:

100 mA maximum without loads connected to outputs.

20A maximum with loads connected to outputs.

Output Ratings:

Relay Contacts:

Circulator Heat or Cool Blower Speed Rating: 15A Full

Load Amperage (FLA) (0.75 pF)/30A Locked Rotor

Amperage (LRA) (0.5 pF).

NOTE: FLA rating is reduced by EAC load.

EAC:

1A maximum.

Circulator Continuous Blower Speed Rating:

8A FLA (0.75pF)/16A LRA (0.5pF).

Humidifier:

1A maximum.

Limit:

10A maximum.

L1/L2 (Burner):

20A maximum.

Thermostat Current:

Heat Mode: 100 mA (R7997 supplied).

Cool Mode: Cooling contactor load 500 mA maximum

(ST7997 supplied).

Cooling Contactor:

2 VA minimum, 12 VA maximum.

Molex® is a registered trademark of Molex Incorporated.

Fuse:

1A (automotive type ATO).

Delay Timings:

Heat On Delay: 45 or 60 seconds (fixed or field

selectable via DIP switch optional position 3).

Heat Off Delay: 60/100/120/150 seconds (four field

selections via DIP switch positions 1 and 2).

Cool On/Off Delay: 0/0 or 30/30 seconds (fixed).

Delay Timing Tolerances:

±5 seconds or ±20 percent, whichever is greater.

Environmental

Temperature Ranges:

Operating: -40°F (-40°C) to +150°F (66°C).

Storage: -20°F (-29°C) to +150°F (66°C).

Humidity:

90 percent relative humidity at 95°F (35°C),

noncondensing.

Approvals:

Underwriters Laboratories Inc. Component

Recognized: File 353.

Canadian Underwriters Laboratories inc. Component

Recognized: Pending approval.

Mechanical:

Dimensions (Fig. 1):

4-9/32 in. (109 mm) long by 4-1/4 in. (108 mm) wide by

3-27/32 (97 mm) high. See Fig. 1.

1 2 3 4 5 6 7 8

Inhaltsverzeichnis

Seite 1 - SPECIFICATIONS

Seite 2 - INSTALLATION

69-12042ST7997 OIL BURNER MOUNTED ELECTRIC FAN TIMERFig. 1. ST7997A,B Oil Burner Mounted Electric FanTimer dimensions in in. (mm).Mounting:Mounts dire

Seite 3

69-12043ST7997 OIL BURNER MOUNTED ELECTRIC FAN TIMERFig. 3. ST7997 Oil Burner Mounted Electronic Fan Timer standard wiring connections.NHUMNEACN1K21K1

Seite 4 - Delay Switches

69-12044ST7997 OIL BURNER MOUNTED ELECTRIC FAN TIMERNHUMNNCOOLHEATMED LO LOHIBLACKREDWHITEVIOLETNOIL PRIMARYL1L1L2L2BURNER/VALVEHUMIDIFIER EACL2THERMO

Seite 5

69-12045ST7997 OIL BURNER MOUNTED ELECTRIC FAN TIMERNHUMNNMED LO LOHIBLACKREDWHITEVIOLETNOIL PRIMARYL1L1L2L2BURNER/VALVEHUMIDIFIER EACL2THERMOSTAT5-WI

Seite 6 - CHECKOUT

69-12046ST7997 OIL BURNER MOUNTED ELECTRIC FAN TIMERFig. 6. ST7997 Fan Timer location and settings forHeat Fan-Off and Heat Fan-On delay switches.M129

Seite 7

69-12047ST7997 OIL BURNER MOUNTED ELECTRIC FAN TIMERTable 2. ST7997 Operating Sequence.Mode Action System ResponseHEAT Thermostat calls forheat. (W te

Seite 8 - 69-1204 G.R. 8-98

69-12048ST7997 OIL BURNER MOUNTED ELECTRIC FAN TIMERHome and Building ControlHoneywell Limited-Honeywell Limitée155 Gordon Baker RoadNorth York, Ontar

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Honeywell ST7997 Bedienungsanleitung

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