TriangleTube Prestige Supplement - Type 5 MCBA, Руководство по управлению приложением

Страница: 10 / 28

8
DHW NTC SENSOR DIFFERENTIALS
(PARAMETER 38 & 39)
When an NTC sensor is selected for the DHW operating
signal with Parameter 46, the on and off differentials can
be adjusted with Parameters 38 & 39.
DHW “On” Differential
(Parameter 38)
DHW “Off” Differential
(Parameter 39)
DHW “On” Differential
(Parameter 38)
The setpoint for domestic hot water in the Indirect Water
Heater is set with Parameter 1. Parameter 38 sets the
domestic hot water storage temperature low limit. A
domestic call is initiated when the domestic hot water tem-
perature goes below Parameter 1 minus Parameter 38.
A low setting of Parameter 38 will result in a quick burn-
er response to any domestic hot water draw from the
Indirect Water Heater. A high setting of Parameter 38
will result in a delayed burner response to any domestic
hot water draw from the Indirect Water Heater.
The DHW “On” Differential setting of Parameter 38
greatly affects the production of domestic hot water.
A low setting of Parameter 38 could result in a rapid
response to a domestic hot water demand resulting
in a potential scald hazard. It is strongly recom-
mended that the installer utilize a thermostatic mix-
ing valve on the hot water outlet of the Indirect Water
Heater. Failure to comply could result in severe per-
sonal injury, death, or substantial property damage.
DANGER
DHW “Off” Differential
(Parameter 39)
The setpoint for domestic hot water in the Indirect Water
Heater is set with Parameter 1. Parameter 39 sets the
domestic hot water storage temperature high limit. A
domestic call will end when the domestic hot water tem-
perature goes above Parameter 1 plus Parameter 39.
A low setting of Parameter 39 will result in a minimal
overshoot of the domestic hot water setpoint. A high set-
ting of Parameter 39 will result in an extended burner
cycle in response to a domestic hot water draw from the
Indirect Water Heater. This extended burner cycle will
result in a final domestic hot water storage temperature
that is much higher than desired.
The DHW “Off” Differential setting of Parameter 39
greatly affects the production of domestic hot water.
A high setting of Parameter 38 could result in an
excessive domestic hot water storage temperature
resulting in a potential scald hazard. It is strongly
recommended that the installer utilize a thermostat-
ic mixing valve on the hot water outlet of the Indirect
Water Heater. Failure to comply could result in
severe personal injury, death, or substantial proper-
ty damage.
Parameter 38 Adjustment
To change Parameter 38, requires entering the Access
Code as outlined on page 2. After entering the Access
Code, press the MODE button until the display shows
PARA
. Press the STEP button to reach Parameter 38.
Press the “+” or “–“ button to change the setting of
Parameter 38 to the desired setting. Press the STORE
button and confirm that the display blinks to indicate the
setting has been stored.
Parameter 39 Adjustment
To change Parameter 39, requires entering the Access
Code as outlined on page 2. After entering the Access
Code, press the MODE button until the display shows
PARA
. Press the STEP button to reach Parameter 39.
Press the “+” or “–“ button to change the setting of
Parameter 39 to the desired setting. Press the STORE
button and confirm that the display blinks to indicate the
setting has been stored.
DANGER