Boiler Parameter Worksheet
Appendix
35
ENVI Cascade Factory Settings and Operational Summary
The master boiler has the following default
parameters:
PARAMETER
DEFAULT
UNITS
HDR SETPOINT
180
°F
POWER MODE
1
HDR MODE
0
HYST START BLR
5
°F
HYST STOP BLR
10
°F
WAIT BLR SW ON
8
Min
WAIT BLR SW OFF
2
Min
HDR-P
20
HDR-I
50
Sec
HDR-D
128
CYCLE INCRMNT
1
CYCLE LIMIT MAX
10
HYS QUIC START
25
°F
QUIC START TME
60
Sec
HYS QUIC STOP
18
°F
QUIC STOP TIME
30
Sec
LOLOAD WAITING
60
START ROTATION
24
Hours
NO BLR ON WAIT
10
Min
ANTI WIND UP
OFF
Each condensing boiler has these default cascade
parameters:
PARAMETER
DEFAULT
UNITS
MAX SUPPLY T
194
°F
LOLOAD HYS SLV
5
°F
LOLOAD MOD DLT
5
°F
LOLOAD WAITSLV
60
Sec
LOAD DETCT DLT
90
CSC MIN RET T
40
°F
HYST MIN RET T
9
°F
RET T MAX PWR
104
°F
RET T MIN PWR
127
°F
PREPUMP PERIOD
20
Sec
Each non-condensing boiler has these default
cascade parameters:
PARAMETER
DEFAULT
UNITS
MAX SUPPLY T
220
°F
LOLOAD HYS SLV
5
°F
LOLOAD MOD DLT
5
°F
LOLOAD WAITSLV
60
Sec
LOAD DETCT DLT
90
CSC MIN RET T
122
°F
HYST MIN RET T
9
°F
RET T MAX PWR
113
°F
RET T MIN PWR
127
°F
PREPUMP PERIOD
30
Sec
1.8.5.1
Master Setup:
The master boiler must be equipped with certain hardware to allow it to control the cascade system.
A list of accessory choices for different applications is shown in section 1.0 on page 3.
In order for the master boiler to function in a cascade system, the master boiler must be equipped with either of the
following:
BP-0000-0279
Sensor and emersion well kit. can be used for header or DHW 12K(ENVI
®
Control)
23-0000-0539
Sensor, strap on, ENVI
®
control can be used for header or DHW, 12K
This temperature sensor shall be installed as a header sensor in the system supply piping, downstream of all the
boilers, and can be purchased from Harsco Industrial Patterson-Kelley.
Additionally, the master boiler can be equipped with an outdoor air temperature sensor.
26-0000-0507
Sensor, outdoor air, Tasseron
This allows the cascade to operate to an outdoor air reset schedule. It is also possible to provide the master boiler
with a 0-10VDC analog control signal, which will establish a temperature setpoint schedule. Please refer to the ENVI
Operation manual for setup of the master boiler using the “HDR MODE” parameter.
