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Figure 13
CHECKING GAS CONNECTIONS
WARNING: Test all gas piping and connections for leaks after installing 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. If
bubbles form, there is a leak. Correct all leaks at once.
PRESSURE TESTING GAS SUPPLY PIPING SYSTEM
Test Pressures In Excess Of 1/2 PSIG (3.5kPa)
1.
Disconnect heater with its appliance main gas valve (control valve) and equipment shutoff valve from gas supply
piping system. Pressures in excess of 1/2 PSIG 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
gas supply valve.
4.
Check all joints of gas supply piping system. Apply mixture of liquid soap
and water to gas joints. If bubbles form, there may be a leak.
5.
Correct all leaks at once.
6.
Reconnect heater and equipment shutoff valve to gas suply. Check
reconnected fittings for leaks.
Test Pressures Equal To or Less Than 1/2 PSIG (3.5 kPa)
1.
Close equipment shutoff valve (see Figure 16).
2.
Pressurize supply piping system by either using compressed air or
opening natural supply tank valve.
3.
Check all joints from gas meter to equipment shutoff valve
(see Figure 17).
Apply mixture of liquid soap and water to gas joints. If bubbles
form, there is a leak.
4.
Correct all leaks at once.
Figure 14
17
17
Figure 15
Figure 16 - Equipment Shutoff Valve
Figure 17 - Fuel Supply
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Questions and answers
I have owned my ProCom MTB300TBA for more than 5 years without any problems other than cleaning the ignitor by using a compressed gas electronics duster. This is usually necessary when dust accumulates around the pilot which extinguishes the flame preventing the unit from igniting the burner. In addition to this I've noticed that the central part of the burner after lighting surges directly in front of the pilot light causes the flame to reach higher towards the top of the inside of the unit. Which didn't occur at all during the first few years of the units' winter operations. Is this behavior due to a loose connection of the coupler connection to the burner? This hasn't created any reason for concern other than wondering if the burner and the pilot need adjustment, replacement or anything else you might know of that I should have knowledge of. If a picture of the unit while in operation would be helpful, please advise. Thank you in advance for any information you can provide or inform me about which will increase the efficiency, safety and the operation of the unit. Thank you, Richard
I purchased a Procom 20,000 BTU Vent Free Propane Heater. After it was installed, it produced yellow-tipped flames, primarily when working in low mode. I contacted my propane supplier, and they sent a technician who installed a new regulator on my supply tank and adjusted the pressure between 12 to 14. It continued to produce yellow-tipped flames, and emitted an odor. I checked the air supply to the room and it has very good ventilation. The humidity level stays below 30%. I contacted ProCom customer service and described this situation, and they decided to replace the unit, which was purchased from Home Depot. I received and installed the replacement unit, and it is producing yellow-tipped flames, and an odor, exactly the same as the first unit that I purchased. Today, I had a technician from the propane company inspect the tank and regulator, and they confirmed that the pressure was between 12 to 14. The technician told me that the issue is not related to pressure, since he varied the pressure and inspected the unit during the process, and the yellow-tipped flames and odor persisted. Please advise. Sincerely, Mike Krumrine