DYNAVENT®
INSTALLATION
(Continued)
Installation must include an equipment shutoff valve (supplied), ground joint union, plugged 1/8" NPT tap, and a sediment trap. Locate NPT tap within reach for test gauge hook up. NPT tap must be upstream from furnace (see Figure 15).
Install an equipment shutoff valve in an accessible location. The equipment shutoff valve is for turning on or shutting off the gas to the appliance.
Apply pipe joint sealant lightly to male threads. Prevent excess sealant from going into pipe. Excess sealant in pipe could result in clogged furnace valves.
CAUTION: Use pipe joint seal- ant that is resistant to liquid pe- troleum (LP) gas.
Install sediment trap in supply line as shown in Figure 15. Locate sediment trap where it is within reach for cleaning. A sediment trap traps moisture and contaminants. This keeps them from going into furnace controls. If sediment trap is not installed or is installed wrong, furnace may not run properly.
IMPORTANT: Locate sediment trap where trapped matter will not freeze. Install sedi- ment trap in a vertical run of pipe. If gas piping enters furnace from rear (outside), you must locate sediment trap in crawl space (see Figure 15). If you install furnace in structure with slab foundation, you must install gas piping to front of furnace (inside) (see Figure 15).
CHECKING GAS
CONNECTIONS
WARNING: Test all gas pip- ing and connections for leaks after installation or servicing. Correct all leaks at once.
WARNING: Never use an open flame to check for a leak. Apply a mixture of liquid soap and water to all 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)
| Gas Piping | Gas Piping | |
Equipment | Entering |
| Entering |
Shutoff Valve | Furnace |
| Furnace |
| Front |
| Rear |
Test Gauge | (Inside) |
| (Inside) |
|
|
| |
Connection |
|
|
|
|
|
| Equipment |
To Gas Supply |
|
| Shutoff |
3" Min. |
|
| Valve |
|
|
| |
Sediment |
|
|
|
Trap |
|
|
|
To Gas Supply |
|
| |
| 3" Min. |
| |
Slab Floor Installation | Test Gauge | Sediment |
|
Connection |
| ||
| Trap |
| |
|
|
| |
Crawl Space Installation
Figure 15 - Gas Connection
1.Disconnect appliance with its appliance main gas valve (control valve) and equipment shutoff valve from gas supply piping system. Pressures in excess of 1/2 psig (3.5 kPa) will damage heater regulator.
2.Cap off open end of gas pipe where equipment shutoff valve was connected.
3.Pressurize supply piping system by either using compressed air or opening main gas valve located on or near gas meter.
4.Check all joints of gas supply piping system. Apply mixture of liquid soap and water to gas joints. Bubbles form- ing show a leak.
5.Correct all leaks at once.
6.Reconnect furnace and equipment shutoff valve to gas supply. Check re- connected fittings for leaks.
10 | 201835 |