GENERAL INFORMATION
PART 1. GENERAL INFORMATION
A. HOW IT OPERATES
When the room thermostat calls for heat, the Munchkin control board will start the circulator and start to monitor the return temperature of the system before the heater will begin to heat the water. Once the controller has sensed a drop in the return water temperature below the temperature set point minus the differential set point, the heater will start to heat the water. This eliminates the Munchkin starting every time the thermostat calls for heat. This feature keeps the system from short cycling.
Once the system has sensed the temperature difference, the Munchkin will activate the blower motor for 5 seconds to
When the thermostat is satisfied, the Munchkin will then go through a 4 second
B. MUNCHKIN RATINGS AND DIMENSIONS
PERFORMANCE RATINGS
Model | Input Modulation | DOE Heating | AFUE | Shipping Weight | *IBR |
T50M | 18,000 to 50,000 | 16,000 to 46,000 | 92% | 58 lbs. | 40,000 |
T80M | 19,000 to 80,000 | 17,000 to 74,000 | 92% | 58 lbs. | 64,000 |
80M | 27,000 to 80,000 | 25,000 to 74,000 | 92% | 75 lbs. | 64,000 |
140M | 46,000 to 140,000 | 43,000 to 129,000 | 92% | 101 lbs. | 112,000 |
199M | 66,000 to 199,000 | 61,000 to 183,000 | 92% | 111 lbs. | 159,000 |
*Net water
CONNECTION SIZES
| Supply/Return |
|
|
Model | Connection | Gas Connection Size | Vent Dia. |
T50M | 1 1/4" NPT | 3/4" | 2" |
T80M | 1 1/4" NPT | 3/4" | 2" |
80M | 1 1/4" NPT | 3/4" | 3" |
140M | 1 1/4" NPT | 3/4" | 3" |
199M | 1 1/4" NPT | 3/4" | 3" |
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