64
•
Set auto reset high limit switch to 90ºC (194ºF) on each heater.
•
The PIM operator setpoint dial on each heater
MUST
be set to the
Indirect DHW Setpoint temperature to prevent a DHW over
temperature condition from occurring when operating in limp mode.
Mode 3
– ADJUST Menu Settings for Hydronic System with Indirect DHW
•
'Default' column shows factory default settings. Actual values will depend on installation. Required
(Rqd) values shown bracketed in
bold must be used or not exceeded where ‘Max’ is shown.
•
Parameters can only be changed if VERSA control board DIP switch 1 is set to ON (up).
•
Some parameters are only available if controlling parameter/device is set as indicated in
‘Description’.
Parameter
Range
Description
Default
(Rqd)
Operation
Mode
1, 2, 3
Selects heater operating mode
1
(3)
Target
Mode
SETP, RSET, EMS,
Modbus
SETP = Setpoint
RSET = Outdoor Reset (outdoor air compensation)
EMS = Energy Management System (if PIM DIP switch 5 is
ON - Default DIP 5 setting is OFF)
Modbus only if Modbus Mode para = Temp or Rate)
SETP
Target
Setpoint
10.0 ~ 115.0°C
Target setpoint (only avail if Target Mode para = SETP)
82.0°C
(80ºC Max)
Target
Max
32 .0~ 110.0°C
Max heating value for indirect DHW @ 10.0vdc input when
Target Mode para = EMS or Modbus
98.0°C
(82.0ºC
Max)
Target Min
10.0 ~ 82.0°C
Min heating value for indirect DHW @ 1.0vdc input when
Target Mode para = EMS or Modbus
10.0°C
Manual
Diff
(1)
1.0 ~ 23.0°C
Only available to be viewed/changed if PIM DIP switch 1 is
ON.
PIM DIP switch 1 should be set to OFF.
5.0°C
System
Purge
Time
OFF,
0:20 ~ 20:00 min
Sets the length of system pump (P2) post purge i.e. pump run
on (only when Modbus Mode para = Temp or Rate and if PIM
DIP switch 3 is ON - Default DIP 3 setting is ON)
0:20 min
Glycol %
0 ~ 50%
Not used for MVB
0%
Ind DHW
Sensor S5
OFF, ON
Select ON if an indirect DHW tank sensor S5 is used in lieu of
an indirect DHW tankstat (only avail if Mode para = 2 or 3)
OFF
Ind Supply
Setpoint
300.0,
0.5 ~ 93.0°C
Indirect DHW tank target setpoint temp when a tankstat is
used in lieu of tank sensor S5 (only avail if MODE para = 2 or
3 and Ind DHW Sensor S5 para = OFF)
82.0°C
Ind DHW
Setpoint
OFF,
10.0 ~ 82.0°C
Indirect DHW target setpoint temp (only avail if Mode para = 2
or 3 and Ind DHW Sensor S5 para = ON)
60.0°C
(82ºC Max)
Ind
Differential
1.0 ~ 5.0°C
Subtractive differential for Ind DHW Setpoint para i.e. 3° diff =
CFH at 3° below Ind DHW Setpoint and CFH end at Ind DHW
Setpoint (only avail if Mode para = 2 or 3 and Ind DHW
Sensor S5 para = ON)
3°C
Priority
Ovr Timer
AUTO,
0:10 ~ 2:00 hr
Sets length of priority override time (only avail if Mode para =
3
or
if Mode para = 2 and Ind Priority Enable para is set to
ON
2:00 hr
WWSD
4.0 ~ 37.5°C
OFF
Warm weather heating shut down temp (only avail if Target
Mode para = RSET) Note: Indirect DHW CFH will override
21.0°C
Outdoor
Start
1.6 ~ 29.4°C
Outdoor reset start temp (only avail if Target Mode para =
RSET)
21.1°C
Outdoor
Design
-51.1 ~ 7.2°C
Outdoor reset design temp (only avail if Target Mode para =
RSET)
-12.2°C
Boiler
Start
1.6 ~ 65.5°C
Starting heater target temp when outdoor temp is at Outdoor
Start temp (only avail if Target Mode para = RSET)
21.0°C
Boiler
Design
21.1 ~ 93.3°C
RSET target setpoint. Calculated when outdoor temp is as
cold as Outdoor Design temp (only avail if Target Mode para
= RSET)
82.2°C
(80ºC Max)
