HTP MC120 - Manual (Page 64)

64
LP-171 Rev. 4.10.14
18 1 Step Modulation – Regulates the burner output in 6 steps in one-minute intervals. This reduces short cycling.
1 = on, 0 = off
19 180
o
Indirect heater set point (flow)
Temperature default = 119
o
to 180
o
20 1 Not applicable
NOTE: The maximum water temperature leaving the heater is limited to 185
o
F.
Table 11 - *Central Heating Curve Function
Central heating demand is detected when the room thermostat closes. When an outside sensor is also connected, the supply
temperature will depend on the factory default central heating curve.
To set your heat curve, you will have to set the following parameters:
1. Minimum outside design temperature: Function 8.
Table 12 – Central Heating Curve – Factory Default
2. Design supply water temperature at the minimum design outside temperature: Function 9.
3. Maximum outside design temperature: Function 10.
4. Design supply water temperature at the maximum outside temperature: Function 11.
NOTE: The homeowner can adjust the heat curve down by adjusting the central heating temperature to a lower setting.