Service Manual
1Service
D: Functions
Reset last 10 errors
The reset last 10 errors parameter allows the error counter to be reset to 0. This parameter can only be cleared by the installer by accessing parameter D1. Once accessed, press the RESET key to clear the counter.
Service mode delay
By pressing the pin button on the front of the display for five (5) seconds, the control will be placed in Service Mode. This will override all other heat demands. The Service Mode allows the installer to set the unit to either maximum firing rate or minimum firing rate for the purpose of combustion analysis. The delay sets the length of time the water heater will stay in the Service Mode if no keys have been pressed before going back to its original state. This parameter can only be changed by the installer by accessing parameter D2. The time range of this parameter is 0 to 40 minutes. The default value is 20 minutes.
E: WHR settings
Tank set point
When a DHW call for heat becomes active, the control will use the tank set point to determine the firing rate of the water heater based on the actual water temperature. This parameter can be changed by the installer by accessing parameter E3. The temperature range of this parameter is 50°F to 190°F. The default value is 180°F.
F:Not used
G:Not used
H: Control modes
Control source
The control source parameter selects the method used to control the modulation of the water heater. This parameter is adjustable by the installer by accessing parameter H2. The control methods are as follows:
1 - Thermostat. The control modulates the water heater based on the user set point and the temperature of the tank sensor when a tank thermostat is used, or the inlet sensor.
2 - BMS (Building Management System). The control modulates the water heater based on the 0 - 10 VDC signal delivered to the appropriate terminals on the connection board. When BMS is selected additional parameters for BMS operation may need to be adjusted. These can only be accessed by the optional PC software. See the Armor Water Heater Smart System PC Program Instructions Manual for additional BMS parameter information.
3 - Cascade. The water heater is part of a group of water heaters sequenced together. The designated Leader water heater determines the total output needed from the group based on the set point and controlling sensor reading. It assigns portions of this output to itself (Leader) and the Member water heaters. When Cascade is selected, each water heater in the group requires a unique address (see below). The default control is Thermostat.
Cascade address
The water heater designated as the Leader needs to be programmed with address 0. All the Member water heaters require addresses from 1 to 7, and the addresses must be different for each Member. The addresses can be in any order, regardless of the order in which the units are wired together. This parameter is adjustable by the installer by accessing parameter H3. The tank sensor must be connected to the Leader water heater. The default address is 1.
Max. cascade set point - Not used
Cascade offset - Not used
Cascade off-on differential - Not used
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