T-M50 / T-M50 ASME Service Manual
Ver. 1.05
65
CONFIDENTIAL
12-12. Multi-unit system ON/OFF conditions
In Easy-link system and Multiple-system, the amount of T-M50 called on to activate depends on the
FLOW RATE and the OUTPUT SET TEMPERATURE.
1.
Condition required to activate an additional T-M50:
Flow rate required to activate additional T-M50 = A × n
Where n= number of currently activated T-M50’s
(One T-M50 has two combustion sections.)
and A is dependent on the output set temperature. See table below:
Output set temperature
Factor "A"
˚F
˚C
GPM
L/min
100 - 120
38 - 49
3.2
12
125,130
52 - 54
2.9
11
140
60
2.6
10
145,150
63 - 66
2.4
9
155 - 185
68 - 85
2.1
8
2. Condition required to reduce the number of activated T-M50’s:
A.
In the case of reducing down from two units T-M50’s to one T-M50
Flow rate = A / 1.7
B.
All other cases: Flow rate = A × (n - 2)
