MAN - Pyrolytic Oven - REV: Original | D. Installation
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CAUTION: IF THE OVEN IS EXHAUSTED INTO A POWERED VENT SYSTEM SUCH AS A LAB
HOOD, THE HOOD EXHAUST SYSTEM SHOULD BE ON ALL THE TIME THAT THE OVEN IS
ON. DO NOT LEAVE THE BUILDING AND SHUT OFF THE HOOD, THEREBY SHUTTING OFF
THE EXHAUST SYSTEM FOR THE OVEN.
WARNING: Draft Inducer must be installed as shown with the ¼” metal tubing connected so that
the Pressure Switch located inside the control box can sense the pressure of the Draft Inducer
Blower Motor. The Blower Motor is interlocked via the Pressure Switch so that the Oven Heaters
cannot come on unless the Draft Inducer Blower Motor runs.
If the Blower Motor fails, the Pressure Switch will sense the loss of fan pressure and shut off the oven heater
elements and give an alarm fault to the operator.
D.6 How to Measure Oven Negative Pressure (Draft)
1. Go to the “Manual Screen” (see “manual screen” section). Observe whether the oven exhibits any draft due
strictly to the installed exhaust piping. For example, connection to a hood exhaust might pull a slight negative
pressure dependent on the power of the hood system itself.
2. Press the “Draft Inducer” button momentarily to start the oven exhaust blower, and observe the negative pressure
achieved inside the oven. The optimum draft is 0.04 inches w.c., and the necessary range is from 0.02 to 0.06
inches w.c. If the exhaust system/duct to which the oven is piped pulls a draft higher than 0.06 inches, then the oven
exhaust must be adjusted until the correct draft is achieved. The oven draft has been factory adjusted with the draft
inducer running without any exhaust stack. Adding stack to the top of the Draft Inducer will change the draft slightly,
but it still should remain in the proper range.
3. Once the oven exhaust has been properly installed and checked, press the “Draft Inducer” button momentarily to
stop the oven exhaust.
CAUTION: DO NOT END A CLEANING CYCLE BY TURNING OFF THE MAIN POWER
TOGGLE SWITCH. THIS PREVENTS THE MAIN OVEN EXHAUST FAN FROM RUNNING TO
REMOVE THE NORMAL HEAT PRESENT DURING COOL-DOWN. IT WILL ALSO UNLOCK
THE DOOR BEFORE COOL DOWN WHICH MAY INTRODUCE AN EXPLOSIVE SITUATION IF
THE DOOR IS OPENED.
D.7 How to Adjust to Oven Draft
Once the Pyrolytic Oven unit is installed and vented, the oven draft should be measured as described in previous
sections. If the draft is not within proper limits, then it must be adjusted. Oven draft is achieved by the venturi effect
of air sucked around the Oxidizer exhaust pipe. See Figure 1. The Draft Inducer suction pulls air past and around
the stainless steel exhaust pipe.
TO INCREASE OVEN DRAFT, THE HEIGHT OF THE EXHAUST PIPE IS INCREASED. TO LOWER OVEN
DRAFT, THE HEIGHT OF THE EXHAUST PIPE IS DECREASED.
Содержание Pyro-Clean
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