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W8735G COMMUNICATION GATEWAY

69-2432—01

2

4.

Remove the W8735G from the wall and drill a minimum 

of two 3/16-in. holes in the wall (if drywall) as marked. 

For firmer material such as plaster, drill a minimum of 

two 7/32-in. holes.

5.

When mounting to the wall, gently tap provided anchors 

into the drilled holes until flush with the wall.

6.

Position the W8735G over the drilled holes. Insert the 

provided mounting screws in the holes and tighten.

Fig. 1. Locating the W8735G in the Equipment Room.

Fig. 2. W8735G Dimensions in inches (mm).

WIRING

CAUTION

Voltage Hazard.

Can cause electrical shock or equipment damage.

Disconnect power before beginning installation to 

prevent electrical shock and equipment damage. More 

than one disconnect may be involved.

IMPORTANT

All wiring must comply with local electrical codes and 

ordinances or NEC codes.

IMPORTANT

Use 18 to 20 gauge color-coded cable for proper wir-

ing. Shielded cable is typically not required. Keep 

this wiring at least one foot away from large inductive 

loads such as electronic air cleaners, motors, line 

starters, lighting ballasts, and large distribution pan-

els. Failure to follow these wiring practices may intro-

duce electrical interference (noise) which can cause 

erratic system operation. All unused wire is to be 

grounded at controller end only. The bus wire to ter-

minal 1/D must not exceed 1,000 feet (305 M).

General Wiring Directions

Refer to Fig. 3 and Table 1 for the location and function of 

each terminal.

IMPORTANT

Wire the W8735G with the plug-in 12V power supply 

disconnected.

1.

Remove power from all devices to be connected to the 

W8735G (Channels and Auxiliary Input and Output).

2.

Remove the cover from the W8735G by gently pulling 

the cover plate outward to disengage the friction 

latches, which are on the side opposite of the wiring 

connections.

3.

Identify the terminal block to be connected and loosen 

the terminal screws using a 3.5 mm slotted screw driver 

See Fig. 3 and Fig. 4.

4.

Insert wire end through the rubber grommet, which is 

supplied in the bag assembly.

5.

Place each of the three cables into its proper terminal 

and securely tighten each screw.

6.

As needed, adjust the position of the grommet and 

press it into place in the slot on the base. See Fig. 3.

7.

Replace the cover.

M29960

WATER HEATER 

W8735G

FURNACE OR BOILER 

10 

(254) 

12V DC 

5 (127) 

(51) 

M29958

Status

EnviraCOM™

Enabled      

Summary of Contents for W8735G

Page 1: ...duct 2 Installer must be a trained experienced service techni cian 3 Complete all wiring connections to the gateway before powering up the 24Vac system transformer and plug ging in the gateway power supply into an outlet 4 All wiring must comply with applicable local electrical codes ordinances and regulations INSTALLATION Mount the W8735G in the equipment room near the indoor HVAC equipment Posit...

Page 2: ...allasts and large distribution pan els Failure to follow these wiring practices may intro duce electrical interference noise which can cause erratic system operation All unused wire is to be grounded at controller end only The bus wire to ter minal 1 D must not exceed 1 000 feet 305 M General Wiring Directions Refer to Fig 3 and Table 1 for the location and function of each terminal IMPORTANT Wire...

Page 3: ...ary Output DO Connect to N O contact alarm input Auxiliary Output DO Connect to N O contact alarm input Auxiliary Input DI Connect to N C sensor contact 18 30 Vac Vdc Auxiliary Input DI Connect to N C sensor contact 18 30 Vac Vdc Channel 3 Model 1018 only 1 D channel 3 To EnviraCOM channel 3 network DATA 2 R channel 3 To EnviraCOM channel 3 network 24 Vac Hot 3 B channel 3 To EnviraCOM channel 3 n...

Page 4: ...MMUNICATION GATEWAY TO OPTIONAL ENVIRACOM CONTROLS AND SENSORS M29961 1 D 2 R 3 B THERMOSTAT OPTIONAL REVIEW COMPONENTS AND ACCESSORIES SECTION FOR COMPATIBLE DEVICES 1 VISIONPRO IAQ 2 2 1 TELEPHONE POWER NETWORK 1 2 3 R7184U OIL PRIMARY CONTROL Status Event Priority Description LED Color Flashes Battery good LOWEST Normal Operation Green Solid Battery low Replace the battery Green Off Battery dea...

Page 5: ...se NOTE The Auxiliary Output is made on all alert conditions and is deactivated when the alert is cleared from the communication bus IMPORTANT Make sure the current draw through the Auxiliary Output terminals does not exceed specifications Use relays or contactors to integrate to line voltage devices Fig 6 AUX IN and AUX OUT Terminals located on the main circuit board Auxiliary Input and Output Ap...

Page 6: ...HANNEL 2 OUTPUT INPUT AUXILIARY POWER FROM THE AUXILIARY INPUT SUPPLIED BY TRANSFORMER 1 T87 OR SIMILAR 1 M23753 1 D 2 R 3 B 1 D 2 R 3 B COMBINATION OF DEVICES CONNECTED IN SERIES TO ANNUNCIATE ON ANY EVENT ON THE AUX IN LOOP 1 CHANNEL 1 CHANNEL 2 OUTPUT INPUT AUXILIARY 1 M23754 1 D 2 R 3 B 1 D 2 R 3 B N C N C COMBINATION OF DEVICES CONNECTED IN PARALLEL TO ANNUNCIATE ON AN AND EVENT ON THE AUX IN...

Page 7: ...ate the server every 30 minutes Applications requiring closer monitoring and faster updates should be connected to a network connection Upon power up the gateway will conduct a self test which includes a broadband or dial up attempt using a pre programmed 800 number Dial up connections are only used in cases where Broadband connections are unavailable For best performance connect to both Network a...

Page 8: ...his routine is repeated between midnight and 4 00 AM local time at which point dial out attempts cease The routine is repeated during the next reporting time of midnight 4 00 AM IMPORTANT For best gateway performance connect to both the network and phone Gateway Updates Periodically the gateway may require a firmware upgrade to enable new features supported by the web application This will occur a...

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