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DIRECT-VENT FIREPLACE
FIREPLACE INSTALLATION
Continued
CONNECTING FIREPLACE TO GAS SUPPLY
Installation Items Needed
•5/16" hex socket wrench or
•sealant (resistant to propane/LP gas, not provided)
1.Open lower louver door panel by gen- tly pulling forward.
2.Route flexible gas line (provided by installer) from equipment shutoff valve to fireplace. Route flexible gas supply line through one of the access holes on side of fireplace or through knockout hole on firebox bottom.
3.Attach a 45° flare union gas connector to flexible gas line from gas supply (see Figure 41). Connect flare union to flex- ible gas line attached to gas regulator of fireplace (see Figure 41).
4.Check all gas connections for leaks. See Checking Gas Connections.
To Fireplace |
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Gas Valve | Flare Union |
GAS SUPPLY TESTING
Note: This section is intended as a guide for qualified service technicians installing gas to the appliance.
CAUTION: Do not connect appliance before pressure test- ing gas piping. Damage to the gas valve may result and an un- safe condition may be caused.
The gas control valve is secured underneath the firebox with two brackets fastened to the firebox bottom. Two pressure taps are pro- vided on the gas control valve for a pressure gauge connection (see Figure 42).
Pilot Gas Line - Do Not Kink |
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Pilot Adjustment Cap |
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| Burner | |
ON/OFF |
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Knob |
| ILOT |
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| FFO |
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| TPTH | To Main |
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Inlet |
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| Burner |
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Pressure Outlet | Conversion Screw | |||
| Pressure | |||
Figure 42 - Millivolt Control Valve
Equipment Shutoff Valve
CHECKING GAS
CONNECTIONS
WARNING: Test all gas pip- ing and connections for leaks after installing or servicing. Cor- rect all leaks at once.
WARNING: Never use an open flame to check for a leak. Apply commercial leak test solution to all gas joints. Bubbles forming show a leak. Correct all leaks at once.
Pressure Testing Gas Supply Piping System
Test Pressures In Excess Of 1/2 PSIG (3.5 kPa)
1. | Disconnect fireplace and its individual |
| equipment shutoff valve from gas supply |
| piping system. Pressures in excess of 1/2 |
| psig (3.5 kPa) will damage fireplace gas |
| regulator. |
2. | Cap off open end of gas pipe where |
| equipment shutoff valve was con- |
| nected. |
3. | Pressurize supply piping system by ei- |
| ther opening propane/LP supply tank |
| valve for propane/LP gas fireplace or |
| opening main gas valve located on or near |
| gas meter for natural gas fireplace, or |
Flexible Gas Line from |
| To Gas | |
Fireplace Gas Valve |
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| Supply | ||
Provided with Fireplace |
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Flexible Gas Line from | (Natural) | ||
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Equipment Shutoff Valve
Provided by Installer | To External | |
Regulator | ||
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| (Propane/LP) | |
Figure 41 - Attaching Flexible Gas Lines Together |
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| using compressed air. |
4. | Check all joints of gas supply piping |
| system. Apply commercial leak test so- |
| lution to all gas joints. Bubbles forming |
| show a leak. Correct all leaks at once. |
5. | Reconnect fireplace and equipment |
| shutoff valve to gas supply. Check re- |
| connected fittings for leaks. |
GAS RATING
MODEL NO. | MBDV37 | MBDV41 | ||
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TYPE OF GAS | NATURAL | PROPANE/LP | NATURAL | PROPANE/LP |
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Max. Input Rating: | 22,000 Btu/hr | 20,000 Btu/hr | 24,000 Btu/hr | 22,000 Btu/hr |
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Orifice Size | #43 | #55 | #42 | #54 |
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Manifold Pressure: | 3.5 in. W.C. | 10.0 in. W.C | 3.5 in. W.C. | 10.0 in. W.C. |
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**Minimum Supply Pressure: | 4.5 in. W.C. | 11.0 in. W.C. | 4.5 in. W.C. | 11.0 in. W.C. |
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**Maximum Supply Pressure: | 10.5 in. W.C. | 13.0 in. W.C. | 10.5 in. W.C. | 13.0 in. W.C. |
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** For the purpose of input adjustment.
20 | 106497 |