Energy Saving Timers

Everyone is looking for simple and inexpensive ways to save energy and money.  Here’s a thought to consider:  hot water heater timers.  Intermatic’s WH Series time switches provide automatic control for electric water heaters. They provide to-the-minute accuracy in programming and time keeping, and they can be programmed for repeat daily scheduling, 5-day working week scheduling, weekend scheduling or any individual day scheduling. Timers can be scheduled for operation during the lowest time-of-day rates or to switch off the electric heater during periods of peak power usage. The time switch can be set to operate for up to 6 ON/OFF operations daily for a maximum of 42 on/off operations weekly. They provide a convenient external override switch and LED load indicator for ease in scheduling hot water as required for extra hot water demands.

If you are in Georgia or Florida, you can contact Stromquist for more information on Intermatic timers.  All others can order this product from one of our affiliates at CGNA.

 

 

 

ASCO Control Panel for Gas Service

The ASCO relay control panels are designed to operate ASCO 120 volt and DC solenoid valves controlling gas flow to school kitchens, domestic cooking classes, metal shops, and laboratories. Many situations now call for a way to lock out gas supplies during closed hours.

Operating the key switch on the 108D10C (DC panel) or the 108D90C (120 AC panel), the control station energizes the relay to open a normally closed ASCO gas solenoid which turns on the gas flow.

Other Features:

*If the control voltage is lost completely or is reduced to approximately 50% of normal value, the relay de-energizes the normally closed valve to shut off gas flow.

*The gas valve will not re-open at restoration of power until an authorized person operates the key switch on the control station. The gas may also be shut off by depressing the normally closed pushbutton switch located on the control station.

*Shallow NEMA 1 flush-mounted enclosure.

*Clearly marked terminals and installation drawing on inside panel cover.

*Optional auxiliary pushbuttons 173A19 and 173A20 may be located at various accessible locations throughout the building.

*Explosion proof gas valves from ½” to 2” available.

If you are a Stromquist customer located in Georgia or Florida  and you need help sizing or ordering an ASCO Gas Control Panel you can contact Stromquist and Company at  www.stromquist.com or call us at               1-800-241-9471         1-800-241-9471. All others can order this product from one of our affiliates at CGNA.

Pneumatics Troubleshooting

Even with all the great new technology in HVAC controls, there are still many pneumatic buildings out there.  If you happen to be someone who has to work on pneumatic controls, you know it can be frustrating when you have a problem with the system.  Here’s a good troubleshooting procedure from Jerry Condiff, the instructor who teaches a great pneumatics class for us here at Stromquist every year.  Jerry has been in the HVAC controls field for over 30 years and really knows pneumatics.

Pneumatics Troubleshooting Procedure

Start at the thermostat or controller.  Check to see if the thermostat will put out a high pressure by turning the set point to its minimum setting.  The pressure should be high on the output gauge.  If not, try adjusting the calibration screw. 

If no air noise is distinguished, check to see if air is present in the supply line into the thermostat (this will require removing the stat from the mounting bracket). If supply air is present but there is no air bleed noise or output pressure, the restrictor is plugged or the nozzle at the bleed port is dirty.  Check and clean the nozzle or clean out the restrictor.

If there is no pressure output but air bleed noise is present, check for an air leak behind the mounting bracket.  Check the air hoses that are connected to the mounting base for deterioration.  Check Honeywell stats for broken plastic air nipples in the back of the mounting base.

If no air leaks are found, plug the branch line of the stat with a jumper hose connected from the supply line to the main or supply to the stat.  If pressure builds on the branch gauge, the branch line of the controlled device (valve, damper or pressure switch) has a leak.  You may also make up a tool consisting of two 5/32 lines and a barbed gauge tee and a 30# pressure gauge.  Connect one end of the hose to supply and the other to the branch port on the mounting base. If you do not read any pressure on the gauge, the branch line has a leak.  If pressure builds, the stat is bad and will need to be replaced.  Use a squeeze bulb and gauge to check controlled device diaphragm for leaks.  If no leaks are present, the branch line hose has a leak and needs to be replaced. 

This procedure may not cover every potential issue you run into with your pneumatic system, but it should at least be a good start, and I hope you find it helpful.  Happy troubleshooting!

Honeywell Commercial Dampers

Choosing dampers can be a mind boggling experience, but once you have an understanding of the basics and a few well asked questions, your needs can be quickly and expertly filled using Honeywell Commercial Dampers.

The first Honeywell Commercial Damper we will look at is the D series of rectangular dampers. The D series is broken down into 3 types the D1, the D2, and, you guessed it, the D3 series. Here are the basics.

D1… ultra low leakage design based at 6cfm @ 4”wc with a velocity rating of 2500-4000 fpm. The blade seals are silicone and the jamb seals are 304 stainless steel.

D2…low leakage design based at 10cfm @ 4”wc with a velocity rating of 2000-3000fpm. The blade seals are extruded vinyl and the jamb seals are 304 stainless steel.

D3…low leakage design based at 120cfm @4”wc with a velocity rating of 2000-3000fpm. These dampers do not have blade seals or jamb seals.

All the rectangular dampers can be fully optioned and sized depending on the client’s needs.

Competitive comparisons:

D1…Ruskin CD60 and the Greenheck VCD33

D2…Ruskin CD36/46

D3…Ruskin CD35 and the Greenheck VCD20

Note: Actuators for the rectangular dampers can be sized by knowing the proper torque needs for the actuator. The formula is:  damper size (length X width) X rated torque multiplier X safety factor = Actuator in-lb torque requirements.

Commercial Round Dampers from Honeywell are available from 6” to 16” with or without actuators.

The D690 series is without actuator, and the DM7600 series come mounted with a Honeywell actuator with a 90 second timing and a 2-10 Vdc or 4-20 mA  ( Honeywell ML7161) or SPDT Floating (Honeywell ML6161) series actuator.

If you are a Stromquist customer located in Georgia or Florida  and you need help sizing or ordering a commercial damper you can contact Stromquist and Company at  www.stromquist.com or call us at 1-800-241-9471. All others can order this product from one of our affiliates at CGNA.