The MPO-IQ control for the Burnham three pass oil boiler has some nice features built into the control. These features may save you some money on the installation and will add the system efficiency to save even more fuel dollars. The IQ control for the oil boiler is different than the gas IQ control as far as available features.
The available selectable features are circulator pre-purge, circulator post purge, two input connections and two pump connections which can be used for Indirect water heater or second zone of heat, and frost protection. The IQ control also hasadjustablee parameters such as high limit, high limit differential, F or C. The IQ control utilizesHoneywell'ss 3 button press to enter parameter mode. We also have option wiring diagrams for the MPO-IQ Boiler.
A quick explanation of these features are as follows;
Pre-purge – If this feature is turned on, factory default is off you will be required enter a time between 1 and 30 minutes. When the boiler receives a call for heat and the boiler water temperature is above 140F, (next control version this will be adjustable) just the circulator will start and use residual heat from the last cycle first. The benefit of this is to allow the burner to have a longer run cycle. The burner will fire when the timer counts down to zero or the water temperature drops below 140f or the indirect water heater gives a call to the boiler.
Post Purge – Pump Overrun Time (also called “off delay” or “post purge”) continues pump operation after a call for heat has ended, sending excess heat from the boiler into the priority zone. Ensure system piping and zone panel settings allow water flow to the priority zone after the call for heat ends. The Pump Overrun Time has a factor setting of 0 minutes and is field adjustable between 0 and 10 minutes.
2 Zones – Choose ZC or ZR -You can connect two zones of heat or 1 demand for heat whether it be 1 thermostat, zone valves or a multi-zone relay and an indirect. The IQ control will accept two inputs and control 2 circulators. If one of the inputs is an indirect water heater it also has priority.
Frost protection - When enabled, frost protection starts the boiler when the water temperature is below 40 F and stops the boiler when the temperature rises above 50°F. Frost protection only protects the boiler from freezing, circulators are not started due to frost protection. Frost protection may be enabled or disabled.
IQcontrol is used in conjunction with the OCP (Optional Control Panel) which will allow plug in modules which consist of Outdoor Reset, manual or automatic reset Low Water Cut-Off and/or automatic or manual reset secondary temperature limit. Some states and municipalities require Low water cut-off and/or secondary limit controls. The manual reset low water cut-off and secondary limit is CSD-1 certified. CSD-1 is a commercial requirement.
Another big feature of the Burnham IQ oil control also offers status displays and troubleshooting. includeler isclude a cat 5 cable which should be plugged into the side of the boiler and the primary control. The IQ control will display err (error) codes and also erp (error codes on the primary control) and you can even read the resistance on the cad cell relay on the IQ control.
