AERCO Modulex High Pressure Manual - Manual (Page 37)

INSTALLATION, OPERATION & MAINTENANCE
6-3
The outside air sensor, supplied with the boiler, should be mounted on an outer North or Northeast,
wall at a minimum height from floor of 8 feet, 2.5 inches (2.5 m) away from windows, doors and
ventilation grates. Never mount the outside air sensor in a sunny position. The connections for the
sensor are at connector number 1, terminals 9 (F9) and 10 (GND) of the boiler controller.
6.4.2 0 To 10 Volt Remote Set-Point
The unit’s set-point can be controlled using a 0 to 10 volt signal. The Modulex controls allow for full
scaling capabilities of voltage and set-point through use of the V-Curve in the Expert Menu of the
Controller. Input wiring for this mode will be to terminals 1 (F15) and 2 (GND) of the E8 Controller
connector number 3 (III).
6.4.3 Constant Set-Point
The constant set-point mode is used when a fixed header temperature is desired. Common uses for
this mode of operation include water source heat pump loops and indirect heat exchangers for potable
ho water systems or processes. No external connections are required for this mode of operation.
6.4.4 Boiler Operation In Case Of Troubleshooting (Manual Mode)
For service and test purposes, any single module, or all simultaneously, can be kept operating at full or
reduced load. In this way the CO
2
level can be checked and, if necessary, adjusted at full or reduced
load (for any single module or for all simultaneously). With this option, troubleshooting failures on each
module is simplified.
6.5 MODULEX BOILER INITIAL STARTUP
Prior to initial start-up of the complete Modulex Boiler, check the following items:
• Ensure that all Installation procedures in Section 2 of GF-115H (including the referenced
documents GF-115-G, GF-115-P-H and GF-115-V) have been completed.
• Ensure that all operating controls, menu settings and limits have been properly set in
accordance with Section 3 of the Modulex E8 Controller Operation & Wiring Guide GF-115-C.
• Ensure that the mode of operation settings have been made in accordance with document
GF-115-C.
Upon completion of the above items, perform the initial startup and combustion calibration procedures as
described in the following paragraphs.
CAUTION
ALL INSTALLATION PROCEDURES SPECIFIED IN GF-115H,
SECTION 2 MUST BE COMPLETED BEFORE ATTEMPTING TO
START THE UNIT.
DO NOT ATTEMPT TO FIRE THE BOILER WITHOUT A FULL
WATER LEVEL. FAILURE TO OBSERVE THIS PRECAUTION
CAN SERIOUSLY DAMAGE THE UNIT AND MAY RESULT IN
PERSONAL INJURY OR PROPERTY DAMAGE. THIS IS NOT
COVERED BY WARRANTY.