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MACH® Series
Gas-Fired Boiler Installation
Page 21
First Digit
Boiler Status
delay. No system call for heat.
8
Burner off - Domestic Hot Water pump
running on delay. No system call for heat.
9 and b
flashing
Burner off – auto reset lockout. A code is
displayed indicating the reason for the
lockout. (See Troubleshooting Section
5.5.)
A Adjusting the 3 way valve if used
H Burner on in manual high fire
L
Burner on in manual low fire
Parameter Mode:
The parameter mode is used to change the settings of
the boiler. The parameter mode is accessed by
pressing the MODE key several times until the display
shows PArA.
The parameters are selected with the STEP key, and
changed with the plus “+” and minus “-“ keys. Once
the desired value is reached, pressing the STORE key
accepts the new setting.
Parameters 1 through 4 are accessible directly at the
parameter level.
Parameters higher than 4 are only accessible by
authorized service personnel trained on the P-K
MACH Series Boiler.
Parameter Description Lower Limit
Upper
Limit
1
DHW setpoint
if used
68° 158°
2 DHW system
ON/OFF
0=OFF
1=ON
2=OFF +pump
continuous
3=ON + pump
continuous
3 Comfort heat
system
ON/OFF
0=OFF
1=ON
2=OFF +pump
continuous
3=ON + pump
continuous
4
Setpoint or
max boiler
temp outdoor
air mode
68° 182°
Information Mode:
The information mode is used to display the values of
the various sensors such as inlet water temp, outlet
water temp etc. The information mode is accessed by
pressing the MODE key several times until InFo is
displayed. The desired sensor is selected with the
STEP key. The following table indicates the
displayed value:
Step Value
1 Outlet water temp
2 Inlet water temp
3 Domestic Hot Water temp *
4 Outdoor air temp *
5 Flue gas temp
6 Boiler outlet setpoint
7 Rate of change outlet temp °F/second
8 Rate of change inlet temp °F/second
9
Rate of change Domestic Hot Water
°F/second
A
Second Comfort Heat system
temperature
* If the sensors for these functions are not installed,
the display will indicate -22.
3.12.1.2 Operating Configurations
The boiler has several different operating
configurations. These are:
• Internal Setpoint
• Domestic Priority
• Outdoor Air Reset
• Analog Input Setpoint
• Analog Input Direct Drive
CAUTION!
Do not modify any parameters other than those
specifically mentioned.