Patterson-Kelley MACH Series, Инструкция по установке и эксплуатации

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MACH® Series Gas-Fired Boiler Installation
Page 22
temperature controller indicates a call for heat from
the DHW system. When the DHW system calls for
heat, the Central heat pump output (Terminal 10 TB2)
deenergizes and the DHW pump output (Terminal 11
TB2) energizes providing 120 VAC power is provided
to energize a relay coil for the DHW pump. The
DHW status should be set to 1 (DHW system ON).
CAUTION!
Terminal 10 and 11 on TB2 are for pilot duty only.
they should not be connected directly to the
pump.
Outdoor Air Reset (optional):
OUTDOOR AIR vs BOILER SETPOINT
70
80
90
100
110
120
130
140
150
160
170
180
190
0 10 20 30 40 50 60 70 80 90
OUTDOOR AIR TEMP °F
B
O
IL
E
R
S
E
T
P
O
IN
T
°
F
The control automatically detects the presence of the
outdoor air sensor. If an outdoor air sensor is present,
the boiler automatically defaults to outdoor air reset
for setting boiler temp. The parameters should be set
according to the following table:
Item Parameter Value
°F
Allowable
Range °F
Maximum Setpoint 4 180 68-185
Minimum Setpoint 5 80 60-140
Outdoor Air
Minimum Temp.
6 20 4-50
Outdoor Air
Maximum Temp.
7 70 59-77
Boiler Shutoff Temp. 10 90 32-140
(32=off)
Outdoor Air Offset 12 0 0-144
Boiler Configuration 34 01
The set point of the boiler is controlled by an outdoor
temperature sensor. As the outdoor temperature falls
the setpoint of the boiler is increased. The boiler
modulates to maintain this setpoint.
The setpoint is adjusted according to the above
parameters. The boiler setpoint will be the maximum
value (180° F) when the outdoor air is at or below a
minimum temperature value (20° F). The boiler
setpoint will be at the minimum value (80° F), when
outdoor air is at or above a maximum temperature
value (70° F). The setpoint for “in between“ values
of outdoor air temperature, is linearly proportional to