Step 4. INSTALL THE VENT SYSTEM & EXTERIOR TERMINATION

In the United States, vent installation must conform with local building codes. In the absence of local codes, vents must be installed in accordance with the current edition of the National Fuel Gas Code (ANSI-Z223.1).

In Canada, vent installation must conform with local building codes. In the absence of local codes, vents must be installed in accordance with the current edition of the National Standard of Canada CAN/CGA-B149.1 or B149.2 Installation Code.

MPB-3328, MPB-3530, MPB-4035 and MPB- 4540 series fireplaces must be vertically vented using listed type-B, double-walled vent pipe with the proper diameter as listed below and a listed vent termination.

Required Pipe Diameter:

MPB-3328 series: Requires 4 in. (102 mm)

MPB-3530 series: Requires 5 in. (127 mm)

MPB-4035 series: Requires 5 in. (127 mm)

MPB-4540 series: Requires 6 in. (152 mm)

A - Connect the proper size Type B-vent system to the fireplace flue collar with three sheet metal screws (No. 8 or larger). See Figure 13. Then install the remainder of the Type B-vent to the outside.

Type B-Vent - 4 in. (102 mm) for MPB 3328 Models, 5 in. (127 mm) for MPB 3530 / 4035 Models or 6 in. (153 mm) for MPB 4540 Models

Securing

Screws

Flue Outlet

Collar

Figure 13

B - The following venting configurations may be installed (see Figure 14):

1 - Vertical - Minimum overall height of the vent system and appliance without an offset must be 10' (2.54 m)

2 - With Offset -

a - Minimum overall height of the vent system and appliance must be 12' (3.66 m) when an offset up to 45 degrees from the vertical is used. The lower part of the offset may start at the fireplace flue collar.

8

Vertical

Installations

10ft.

Minimum

Back View

Of Appliance

Figure 14

b - Minimum overall height of the vent system and appliance must be 15' (4.57 m) when an offset, more than 45 degrees but less than 60 degrees from the vertical, is used. The lower part of the offset may start at the fireplace flue collar.

Maximum overall height of the vent system and appliance should not exceed 40 feet (12.19 m).

Install the B-vent system in accordance with the vent manufacturer's instructions.

CAUTION: THIS APPLIANCE CANNOT BE VENTED HORIZONTALLY.

Note: Refer to the vent manufacturers installation instructions for variations of venting techniques. If common venting of several units is contemplated, it should be discussed with an architect and the local Building Department.

Do not place insulation materials within 1 in. of the gas vent system.Step 5. FIELD WIRING

Refer to Section A for millivolt appliances and Section B for electronic appliances. The gas valve is set in place and pre-wired at the factory on both models.

A. SIT Millivolt Wiring(See Figure 15) –

1. Select any of the following optional con- trols: appliance-mounted (rocker switch) or wall-mounted switch, thermostat, or one of the optional remote control kits. If appliance- mounted ON/OFF control is selected mount it in the gas valve mounting bracket.

2. If wall-mounted ON/OFF control switch or thermostat is selected mount it in a convenient location on a wall near the fireplace.

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

Offset

Installations

*12 ft. Min. **15 ft. Min.

Back View

Of Appliance

*with an offset up to 45 degrees

**with an offset greater than 45 degrees and up to 60 degrees

3. Wire the control switch within the millivolt control circuit using the 15 feet of 2 conductor wire supplied with the unit . Caution: do not connect the optional wall switch to a 120V power supply.

4.Alternatively, the appliance may be operated without the use of the controls indicated in Instruction #1, solely by manipulating the gas valve control knob. In order to use this method, twist the free ends of the two conductor wire (located in the lower compartment of the unit) together as shown in Figure 15.

Note: The supplied 15 feet of 2 conductor wire has one end of each conductor connected to the gas valve circuit and the other end of each conductor placed inside the control compart- ment.

SIT Millivolt Wiring Diagram

If any of the original wire as supplied must be replaced, it must be replaced with Type AWM105°C – 18 GA. wire.

 

 

BK

 

 

SWITCH

 

HT PT

BK

LIMIT

PT

HT

Thermopile

BKWT

A B

*OPTIONAL ON/OFF SWITCH, WALL SWITCH, THERMOSTAT OR REMOTE CONTROL RECEIVER

*TWIST WIRES “A” AND “B” TOGETHER TO OPERATE UNIT SOLELY BY MANIPULATING THE GAS VALVE CONTROL KNOB; OR CONNECT WIRES TO OPTIONAL ON/OFF SWITCH OR WALL SWITCH OR THERMOSTAT OR REMOTE CONTROL RECEIVER TO OPERATE UNIT.

Schematic Representation Only

Figure 15