The Re-Verber-Ray TP-264D is a normally open differential pressure switch supplied with a sensing hose and brass barb. It is the current Re-Verber-Ray / Detroit Radiant Products part number and a direct substitute for the older TP-61D / PPS10069-2551. It ships complete with a 20 in. vinyl sensing tube and insect-resistant brass barb(s), factory set at .20 in. w.c.
The switch component cross-references to the Cleveland Controls (a Division of UniControl Inc.) model NS2-1068-01 (.20" w.c.) per distributor listings. OEM equivalence is established by distributor cross-reference and should be confirmed before relying on the OEM NS2 ratings below.
What it does. The TP-264D is an air-pressure-sensing safety / airflow-proving switch used in Re-Verber-Ray gas-fired infrared tube heaters. It senses the differential air pressure across the burner / combustion-air path through its flexible sensing tube and brass barb fitting. When proper airflow is present, the snap-action contacts change state to prove airflow and allow the burner sequence to continue. The installation sheet labels it a "Normally Open Pressure Switch" wired to the COM and N.O. terminals.
Replacing this part. The TP-264D is a direct substitute for the discontinued TP-61D / PPS10069-2551. When replacing the older switch, transfer the sensing tube to the same port and observe the COM and N.O. terminal markings. As with all gas-heating parts: shut off the gas supply and disconnect power before servicing, verify the set point and wiring against the installation sheet, and have a qualified technician confirm airflow proving after replacement.
| Switch type (as marketed) | Normally Open Differential Pressure Switch with hose and barb |
| Capacity / heater BTU rating served | 175 MBH |
| Factory pressure set point | .20 in. w.c. (0.20" WC) |
| Wiring terminals | Spade terminals to COM and N.O. |
| Included contents | TP-264D switch, 20 in. vinyl sensing tube, insect-resistant brass barb(s) |
| Warranty | 90 Days |
| Contact arrangement (OEM NS2 cross-ref) | SPDT; fine-silver contacts; NC with spring engaged before pressure applied; changes position at set point |
| Electrical rating (OEM NS2 cross-ref) | 1/10 HP @ 120-277 VAC; 28 VA pilot duty @ 24 VAC; 125 VA pilot duty @ 120 VAC; 5 A resistive @ 24, 120-277 VAC |
| Electrical connectors (OEM NS2 cross-ref) | 1/4" x .032" 90-degree quick-connect |
| Diaphragm material (OEM NS2 cross-ref) | Silicone |
| Maximum pressure rating (OEM NS2 cross-ref) | 14" wc |
| Operating temperature (OEM NS2 cross-ref) | -40 to 88 C (-40 to 190 F) |
| Housing (OEM NS2 cross-ref) | Polycarbonate housing containing a sensing diaphragm |
| Primary part number | TP-264D (Re-Verber-Ray / Detroit Radiant) |
| Alternate part number | IS22020051F5170 |
| Alternate (install-sheet shorthand) | IS2F5170 / IS2 |
| Replaces / direct substitute for | TP-61D |
| Replaces / direct substitute for | PPS10069-2551 (PPS-2551) |
| OEM equivalent | Cleveland Controls NS2-1068-01 (.20" wc) [confirm with Mark] |
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