HTP 399M User Manual
Page 64
64
DEFAULT
FUNCTION
FUNCTION
VALUE
DESCRIPTION
17
0
Interface Board Function
0 = Building Management, 1 = Enables Tekmar Modulating Control
(Consult with Tekmar to assure the Tekmar Control is compatible.)
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 boiler set point (flow)
Temperature default = 119
o
to 180
o
20
1
Not applicable
NOTE: The maximum water temperature leaving the boiler is limited to 185
o
F.
Table 12 - *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.
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.
CONTROL PROGRAM REFERENCE CHART
FUNCTION
DEFAULT
SETTING
PROGRAMMED
SETTING
1
de
No change allowed
2
149
o
F
No change allowed
3
160
o
F
4
36
o
F
No change allowed
5
7
o
F
6
0 Min.
7
68
o
F
8
5
o
F
9
180
o
F
10
68
o
F
11
95
o
F
12
68
o
F
13
0 Min.
14
30 Min.
15
0
16
0
17
0
18
1
19
180
o
F
Table 13
– Reference Chart