Dhw Settings; Using The Supply/Return Sensor; Supply/Return Set Point; Supply/Return Peak/Light Differential - heat-timer MPC Platinum Installation And Operation Manual

DHW SETTINGS

SELECT: Settings/<Maintenance>/<DHW Settings>
• The DHW (Domestic Hot Water) Energy Saver connects to any of the Platinum Internet
controls (RINet) with software version 7.05 or higher to operate a boiler or direct/indirect
water heater and a DHW circulating pump based on two set points. One set point is for the
boiler water and the other is for the return pump.
• The DHW Energy Saver uses two sensors connected to the Platinum RINet (Internet
communication capable control). Aux Temp 0 sensor measures the boiler supply
temperature. Aux Temp 1 sensor measures the domestic recirculation-line return
temperature.
• All the DHW Energy Saver settings are viewable and adjustable through the Platinum
control menus or the Platinum control pages on ICMS website (http://www.htcontrols.com).

USING THE SUPPLY/RETURN SENSOR

Yes, No
SELECT Maintenance/DHW Settings/Supply Settings/Use Sensor
SELECT Maintenance/DHW Settings/Return Settings/Use Sensor
• By activating the Supply Sensor feature, the Platinum control will utilize Aux Temp 0 input
as the Supply Sensor.
• By activating the Return Sensor feature, the Platinum control will utilize Aux Temp 1 input
as the Return Sensor.

SUPPLY/RETURN SET POINT

Supply is adjustable from 60°F/16°C to 200F°/93°C
Return is adjustable from 60°F/16°C to 200F°/93°C
SELECT Maintenance/DHW Settings/Supply Settings/Setpoint
SELECT Maintenance/DHW Settings/Return Settings/Setpoint
• The Supply Set Point is the maximum boiler water temperature the DHW Energy Saver will
try to achieve. The relay will energize whenever the supply temperature drops below this set
point less the differential. See next setting.
• The Return Set Point is the maximum temperature at which the DHW pump relay will
de-energize. The circulating pump relay will energize whenever the return temperature drops
below this set point less the differential. See next setting.

SUPPLY/RETURN PEAk/LIGHT DIFFERENTIAL

Peak is adjustable from 5F°/3C° to 100F°/56C°
Light is adjustable from 5F°/3C° to 100F°/56C°
SELECT Maintenance/DHW Settings/Supply Settings/Peak Diff or Light Diff Supply Sensor
SELECT Maintenance/DHW Settings/Return Settings/Peak Diff or Light Diff Return Sensor
• Subtract the Differentials from the Set Points to determine the temperature at which the
boiler/water heater or return pump relay will energize.
• The DHW Energy Saver has two independent differentials for each of the supply and return.
The Peak Differential keeps tight control over the supply temperature during heavy usage.
For proper operation, set its value less than the same sensor's Light Differential.
• The Light Differential reduces the control of the temperature during the off-peak periods,
low DHW usage. It allows the boiler or pump relay to turn on for a slightly longer period.
However, due to the reduced usage, the relay will remain off for a much longer period. Its
value must be greater than the same sensor's Peak Differential.
32
Default: No
Supply Sensor
Return Sensor
Supply Default: 140°F/60°C
Return Default: 120°F/49°C
Supply Sensor
Return Sensor
Peak Default: 10F°/6C°
Light Default: 20F°/11C°
MPC Platinum Installation and Operation Manual
--- DHW SETTINGS ---
<Supply Settings>
<Return Settings>
Demand Schedule
Copy Schedule
USE SUPPLY SENSOR
No
Yes
USE RETURN SENSOR
No
Yes
DHW SUPPLY SETPOINT
140 F
[
DHW RETURN SETPOINT
120 F
[
DHW SUPPLY PEAK DIFF
20 F
[
DHW SUPPLY LIGHT DIFF
40 F
[
DHW RETURN PEAK DIFF
20 F
[
DHW RETURN LIGHT DIFF
40 F
[
]
]
]
]
]
]