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Quest Gas Fired CHH-300 Installation, Operation and Maintenance Instructions
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H. The CHH-300 will produce condensate while operating, at any time that the circulating fluid is cooler
than approximately 130ºF (54ºC). A clear poly-tube is connected to a fitting in the bottom of the chamber at
front and is routed to the outside of the cabinet to carry condensate away. This tube should be inspected and
cleaned, if necessary, when putting the system into operation on every new project or a minimum of once
yearly.
I. Flame inspection is recommended on a frequent basis (about once per month under normal continuous
service) and a flame inspection port is available for this. It is located just above the burner on the front flange
plate disk of the combustion chamber. A 3/8” NPT plug must be removed to see into the inner chamber
while the burner is fired. Be sure that the plug is replaced when this check is complete. Must be performed
by a trained service technician ONLY.
a. Normal flame for natural gas or propane should be blue with slight orange tips at the cone of the
flame.
b. Although visual inspection is beneficial. We strongly recommend that instruments be used to check
combustion quality. This procedure is outlined in (#.1), above.
J. On a daily basis, the area around this system must continue to be kept clear and free from combustible
materials, gasoline and all other flammable vapors and liquids.
K. At the circulation pump end of the CHH-300 cabinet, Louvers are stamped into the access door to
provide intake air for combustion and ventilation. Check on a daily basis to ensure that nothing is allowed to
obstruct this free-flow of air.
L. Check heat transfer fluid level daily. Maintain between ¼ and ¾ level during normal operation. If
excessive fluid loss occurs check all hoses and connections for leaks. Top-up only with approved HTF.
M. Verify that all gauges are maintaining within their desired operating ranges with respect to setpoint.
N. For propane systems ONLY. Check fuel tank level daily and order fuel as required.
O. Make sure that all access doors and panels are kept closed and locked while the system is in use.
P. Isolate and clean the Y-strainer before each set up, at least once per year or as required due to fluid
contamination. To clean the Y-strainer (Fig. 31) close the ball valve, immediately adjacent to the Y-strainer
and disconnect the adjacent quick-coupler connection at the alcove manifold (Fig. 26), on the outside of
the cabinet. This will isolate the Y-strainer. The cap on the Y-branch can now be removed so the cylindrical
screen can also be removed. Clean the screen with compressed air or a small wire brush. Put the screen
back in place, replace the cap, re-connect the quick coupler connection and open the valve.
For further service assistance
Call the manufacturer toll free at: 1-866-413-5214 to speak to a Hydronic Service Specialist
