Patterson-Kelley MACH Series Installation & Owner's Manual page 24

MACH® Series Gas-Fired Boiler
Standby Mode:
The display defaults to this mode at startup or reset of
the control. If no key is pressed for 20 minutes the
display will return to this mode. The function of the
keys may be two-fold as shown below.
Key(S) Duration
Mode momentary
Reset momentary
Plus momentary
Plus long*
Minus momentary
Minus long*
*Note: Long duration is greater than 2 seconds.
When in the Standby Mode the control indicates boiler
status with the first digit of the display. The remaining
digits indicate the boiler's actual temperature or
lockout code. The following table indicates the
meaning of the display digits when in the standby
level.
First Digit
0 Burner off - No call for heat
1 Pre purge or post purge
2 Ignition
3 Burner on in Comfort Heat mode
4 Burner on in Domestic Hot Water mode
5 Checking the airflow switch
Burner off - An internal setpoint has been
6 reached. System is still calling for heat.
Burner off - Comfort Heat pump running on
7 delay. No system call for heat.
Burner off - Domestic Hot Water pump
8 running on delay. No system call for heat.
Burner off – auto reset lockout. A code is
displayed indicating the reason for the
9 and b lockout. (See Troubleshooting Section
flashing 5.5.)
A Adjusting the 3 way valve if used
H Burner on in manual high fire
L
Burner on in manual low fire
Function
Change to next mode
Reset the control
Show the comfort heat
setpoint, or max setpoint
(outdoor reset only)
Turn the comfort heat system
on or off
Show the domestic hot water
setpoint
Turn the domestic hot water
system on or off
Boiler Status
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
1
2
3
4
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:
Page 20
Description Lower Limit
DHW setpoint
if used 68°
DHW system 0=OFF
ON/OFF
1=ON
2=OFF +pump
continuous
3=ON + pump
continuous
Comfort heat 0=OFF
system
1=ON
ON/OFF
2=OFF +pump
continuous
3=ON + pump
continuous
Setpoint or
max boiler
temp outdoor
air mode 68°
Installation
Upper
Limit
158°
182°