AERCO RECON 1000 - Manual (Page 59)

RECON Water Heaters Installation, Operation & Maintenance Manual
CHAPTER 4 – INITIAL START-UP
OMM-0103_0A AERCO International, Inc.  100 Oritani Dr.  Blauvelt, NY 10913 Page 59 of 178
GF-147 Phone: 800-526-0288 PRI: 10/28/2014
Connecting a Multimeter to the Flame Detector
1. Refer to Figure 4-3 and remove the right side panel from the unit to access the flame detector.
2. Disconnect the flame detector wire lead 135 from the detector and connect the multimeter in
series with the wire lead using alligator clips as shown in Figure 4-3.
3. Ensure that the multimeter is set to the µA scale.
Figure 4-3: Flame Strength Set-Up Using Multimeter
IMPORTANT
The unit is shipped from the factory set up for either Natural Gas or
Propane, as specified by the Style Number on the Sales Order.
Perform the appropriate Combustion Calibration procedures in
section 4.3 for Natural Gas, or section 4.4 for Propane.
4.2.5 Recommendations for Temperature Calibration
Carefully follow the procedures of section 4.4 Temperature Control Calibration , below, to
properly set up the temperature control for the heater. Ignoring this commissioning step may
cause water temperature faults, poor water temperature control, and rapid cycling of the heater.
4.2.6 Recommendations for WHM (Water Heater Management) Operation
In case of multiple RECON units, it is highly recommended to ALWAYS operate the system in
WHM mode. Operation in WHM mode ensures that the system flow will be divided between at
least 2 or more units as demand increases. In addition, WHM ensures that all units receive equal
run time and additional water heaters are activated based on the “NEXT ON” firing rate setting.
In case of pre-heated DHW systems with multiple RECON units, it is highly recommended to
lower the “NEXT ON” setting to 30 - 40% (Default = 50%), so that subsequent Water Heaters are
engaged sooner to provide more rapid response and divide the system flow over additional units.
In case of DHW pre-heat systems, the required temperature rise through an individual unit can be
much lower to ensure that flow per unit does not exceed 50 GPM at any time.
FLAME DETECTOR
(CLIP MULTIMETER
LEAD TO TERMINAL)
IGNITOR
EXHAUST
MANIFOLD
MULTIMETER
CLIP LEAD TO HARNESS WIRE #135