Table of Contents
Advertisement
11
Operating information
General
How the appliance operates
The Armor X2 uses advanced stainless steel heat exchangers
and electronic control modules that allow fully condensing
operation. The blowers pull in air and push flue products
out of the water heater through the heat exchangers and flue
piping. The control modules regulate blower speed to control
the firing rate. The gas valve senses the amount of air flowing
into the water heater and allows only the right amount of gas
to flow.
How the control modules operate
The Armor X2 water heater is equipped with two (2) SMART
TOUCH control modules. The control modules work in
synchronization to meet the heat demand of the system.
The SMART TOUCH control modules receive input from
water heater sensors and external inputs.
modules activate and control the blowers and gas valves to
regulate heat input and switches the pumps on and off as
needed. The user programs the control modules to meet hot
water heating needs by adjusting control parameters. These
parameters set operating temperatures and water heater
operating modes. Water heater operation is based on tank
temperature, the 0-10V BMS input, or ModBus.
Control inputs and outputs
0 - 10V input (set point or power)
The Armor X2 can be controlled by a Building Management
System (BMS) using a 0 - 10 VDC signal. The control can be
configured by the installer to use this signal to either control
set point or firing rate.
Tank sensor
This input tells the water heater the temperature inside the
HW tank.
Anti-cycling
After a HW demand has been satisfied, the control will delay
the next HW call for a set time period (time is adjustable by
the installer). The time delay will be bypassed if the inlet
water temperature drops too far during the delay.
50
HW pump control
When a HW call for heat starts, the appropriate HW pump is
turned on.
Louver
A dry contact is provided to open and close louvers whenever
the Armor X2 water heater requires combustion air from inside
the room. Connect the Louver End Switch to the Louver
Proving Switch input on the Low Voltage Connection Board.
Temperature control
Modulation
The Armor X2 is capable of modulating its firing rate from a
minimum of 10% to a maximum of 100%. The firing rate is
dictated by the call for heat, the HW draw, and various other
The control
temperature limitations.
Night setback
The controller may be programmed to reduce the tank set point
during a certain time each day. A start and stop time can be
programmed for each day of the week.
Flame current support
To prevent nuisance shutdowns when the water heater is firing
at minimum rates, the control will increase the firing rate when
the flame signal drops below 5 µA.
Installation & Operation Manual
Hide quick links:
Advertisement
Table of Contents
